<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
	xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
		>

<channel>
	<title>MedicsKey | 生物化學 | Activity</title>
	<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/</link>
	<atom:link href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/feed/" rel="self" type="application/rss+xml" />
	<description>Activity feed for the group, 生物化學.</description>
	<lastBuildDate>Mon, 09 Mar 2026 08:53:57 +0800</lastBuildDate>
	<generator>https://buddypress.org/?v=2.16.1</generator>
	<language>zh-TW</language>
	<ttl>30</ttl>
	<sy:updatePeriod>hourly</sy:updatePeriod>
	<sy:updateFrequency>2</sy:updateFrequency>
		
								<item>
				<guid isPermaLink="false">afae6ba9ccf5cd9b14c4096880eb8f25</guid>
				<title>MedicsKey.A started the discussion 南方墨點法（Southern blotting）適用於限制性片段長度多態性（RFLP）技術中的去氧核糖核酸指紋鑑定（DNA fingerprinting）。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%8d%97%e6%96%b9%e5%a2%a8%e9%bb%9e%e6%b3%95%ef%bc%88southern-blotting%ef%bc%89%e9%81%a9%e7%94%a8%e6%96%bc%e9%99%90%e5%88%b6%e6%80%a7%e7%89%87%e6%ae%b5%e9%95%b7%e5%ba%a6%e5%a4%9a%e6%85%8b%e6%80%a7/</link>
				<pubDate>Wed, 08 Jan 2025 14:58:19 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%8d%97%e6%96%b9%e5%a2%a8%e9%bb%9e%e6%b3%95%ef%bc%88southern-blotting%ef%bc%89%e9%81%a9%e7%94%a8%e6%96%bc%e9%99%90%e5%88%b6%e6%80%a7%e7%89%87%e6%ae%b5%e9%95%b7%e5%ba%a6%e5%a4%9a%e6%85%8b%e6%80%a7/">南方墨點法（Southern blotting）適用於限制性片段長度多態性（RFLP）技術中的去氧核糖核酸指紋鑑定（DNA fingerprinting）。</a></p> <div class="bb-content-inr-wrap"><p>11211-100 生化<br />
100.以限制性片段長度多態性（restriction fragment length polymorphisms, RFLPs）來進行去氧核糖核酸指紋鑑定（DNA fingerprinting）時，通常需要結合下列何種生物技術？<br />
A.西方墨點法（Western blotting）<br />
B.南方墨點法（Southern blotting）<br />
C.北方墨點法（Northern blotting）<br />
D.長條墨點法（slot blotting）</p>
<p>正確答案: B.南方墨點法（Southern blotting）</p>
<p>為何正確: 在以限制性片段長度多態性（restriction fragment length polymorphisms,&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-734"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%8d%97%e6%96%b9%e5%a2%a8%e9%bb%9e%e6%b3%95%ef%bc%88southern-blotting%ef%bc%89%e9%81%a9%e7%94%a8%e6%96%bc%e9%99%90%e5%88%b6%e6%80%a7%e7%89%87%e6%ae%b5%e9%95%b7%e5%ba%a6%e5%a4%9a%e6%85%8b%e6%80%a7/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">3c5379542db8c7c919aa78cc5382ea21</guid>
				<title>MedicsKey.A started the discussion Protein kinase A (PKA) 是由cyclic AMP (cAMP) 結合而活化。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/protein-kinase-a-pka-%e6%98%af%e7%94%b1cyclic-amp-camp-%e7%b5%90%e5%90%88%e8%80%8c%e6%b4%bb%e5%8c%96%e3%80%82/</link>
				<pubDate>Wed, 08 Jan 2025 14:42:16 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/protein-kinase-a-pka-%e6%98%af%e7%94%b1cyclic-amp-camp-%e7%b5%90%e5%90%88%e8%80%8c%e6%b4%bb%e5%8c%96%e3%80%82/">Protein kinase A (PKA) 是由cyclic AMP (cAMP) 結合而活化。</a></p> <div class="bb-content-inr-wrap"><p>11211-99 生化<br />
99.下列關於protein kinase A 的敘述，何者正確？<br />
A.結合cyclic GMP 而活化<br />
B.結合AMP而活化<br />
C.結合cyclic AMP 而活化<br />
D.其活化可促進細胞內脂肪酸的生合成（fatty acid biosynthesis）</p>
<p>正確答案: C.結合cyclic AMP 而活化</p>
<p>為何正確: 蛋白激酶A（Protein kinase A）是由cyclic AMP（cAMP）所活化的。cAMP與蛋白激酶A的異位性結合位（allosteric site）結合後，會促使其活化，進而進行下游的磷酸化作用。</p>
<p>選項: A<br />
詳解: 錯誤，protein kinase A (PKA) 是由cyclic AMP (cAMP)&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-733"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/protein-kinase-a-pka-%e6%98%af%e7%94%b1cyclic-amp-camp-%e7%b5%90%e5%90%88%e8%80%8c%e6%b4%bb%e5%8c%96%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">fb0d341163a2dde852ac44debc3e5e7a</guid>
				<title>MedicsKey.A started the discussion 類固醇激素（steroid hormone）的受體不是位於細胞膜表面，而是在細胞內。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e9%a1%9e%e5%9b%ba%e9%86%87%e6%bf%80%e7%b4%a0%ef%bc%88steroid-hormone%ef%bc%89%e7%9a%84%e5%8f%97%e9%ab%94%e4%b8%8d%e6%98%af%e4%bd%8d%e6%96%bc%e7%b4%b0%e8%83%9e%e8%86%9c%e8%a1%a8%e9%9d%a2%ef%bc%8c/</link>
				<pubDate>Wed, 08 Jan 2025 14:34:20 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e9%a1%9e%e5%9b%ba%e9%86%87%e6%bf%80%e7%b4%a0%ef%bc%88steroid-hormone%ef%bc%89%e7%9a%84%e5%8f%97%e9%ab%94%e4%b8%8d%e6%98%af%e4%bd%8d%e6%96%bc%e7%b4%b0%e8%83%9e%e8%86%9c%e8%a1%a8%e9%9d%a2%ef%bc%8c/">類固醇激素（steroid hormone）的受體不是位於細胞膜表面，而是在細胞內。</a></p> <div class="bb-content-inr-wrap"><p>11211-98 生化<br />
98.下列何者與類固醇激素（steroid hormone）之作用方式無關？<br />
A.激素會與受體形成複合體（hormone-receptor complexes）<br />
B.受體主要在細胞膜表面以磷酸化方式活化<br />
C.受體具備與特殊DNA序列結合之特性<br />
D.受體與激素結合後可活化或抑制基因轉錄</p>
<p>正確答案: B.受體主要在細胞膜表面以磷酸化方式活化</p>
<p>為何正確: 類固醇激素（steroid hormone）通常進入細胞後與細胞質或核內的受體結合形成複合體，而不是在細胞膜表面活化。這些複合體進一步進入細胞核，與特定的DNA序列結合，調節基因的轉錄。因此，類固醇激素的作用機制不涉及細胞膜表面受體的磷酸化。</p>
<p>選項: A<br />
詳解: 類固醇激素（steroid&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-732"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e9%a1%9e%e5%9b%ba%e9%86%87%e6%bf%80%e7%b4%a0%ef%bc%88steroid-hormone%ef%bc%89%e7%9a%84%e5%8f%97%e9%ab%94%e4%b8%8d%e6%98%af%e4%bd%8d%e6%96%bc%e7%b4%b0%e8%83%9e%e8%86%9c%e8%a1%a8%e9%9d%a2%ef%bc%8c/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">c33720f08c12fb2b3f884c4546bda7f5</guid>
				<title>MedicsKey.A started the discussion Laminin 是細胞外基質中的蛋白，不參與真核生物細胞週期的調控。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/laminin-%e6%98%af%e7%b4%b0%e8%83%9e%e5%a4%96%e5%9f%ba%e8%b3%aa%e4%b8%ad%e7%9a%84%e8%9b%8b%e7%99%bd%ef%bc%8c%e4%b8%8d%e5%8f%83%e8%88%87%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%b4%b0%e8%83%9e%e9%80%b1/</link>
				<pubDate>Wed, 08 Jan 2025 14:31:27 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/laminin-%e6%98%af%e7%b4%b0%e8%83%9e%e5%a4%96%e5%9f%ba%e8%b3%aa%e4%b8%ad%e7%9a%84%e8%9b%8b%e7%99%bd%ef%bc%8c%e4%b8%8d%e5%8f%83%e8%88%87%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%b4%b0%e8%83%9e%e9%80%b1/">Laminin 是細胞外基質中的蛋白，不參與真核生物細胞週期的調控。</a></p> <div class="bb-content-inr-wrap"><p>11211-97 生化<br />
97.下列何者不是真核生物細胞週期進行的主要調控蛋白？<br />
A.cyclin<br />
B.cyclin-dependent protein kinase（CDK）<br />
C.laminin<br />
D.anaphase-promoting complex（APC/C）</p>
<p>正確答案: C.laminin</p>
<p>為何正確:&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-731"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/laminin-%e6%98%af%e7%b4%b0%e8%83%9e%e5%a4%96%e5%9f%ba%e8%b3%aa%e4%b8%ad%e7%9a%84%e8%9b%8b%e7%99%bd%ef%bc%8c%e4%b8%8d%e5%8f%83%e8%88%87%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%b4%b0%e8%83%9e%e9%80%b1/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">5c4c0a9b8c9d70cb80595a6e4016f519</guid>
				<title>MedicsKey.A started the discussion 粒線體電子傳遞鏈 complex IV 的電子供應者是細胞色素c(cytochrome c)。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b2%92%e7%b7%9a%e9%ab%94%e9%9b%bb%e5%ad%90%e5%82%b3%e9%81%9e%e9%8f%88-complex-iv-%e7%9a%84%e9%9b%bb%e5%ad%90%e4%be%9b%e6%87%89%e8%80%85%e6%98%af%e7%b4%b0%e8%83%9e%e8%89%b2%e7%b4%a0ccytochrome-c/</link>
				<pubDate>Wed, 08 Jan 2025 14:23:20 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b2%92%e7%b7%9a%e9%ab%94%e9%9b%bb%e5%ad%90%e5%82%b3%e9%81%9e%e9%8f%88-complex-iv-%e7%9a%84%e9%9b%bb%e5%ad%90%e4%be%9b%e6%87%89%e8%80%85%e6%98%af%e7%b4%b0%e8%83%9e%e8%89%b2%e7%b4%a0ccytochrome-c/">粒線體電子傳遞鏈 complex IV 的電子供應者是細胞色素c(cytochrome c)。</a></p> <div class="bb-content-inr-wrap"><p>11211-96 生化<br />
96.下列何者為粒線體電子傳遞鏈 complex IV之電子供應者（electron donor）？<br />
A.succinate<br />
B.cytochrome c<br />
C.coenzyme Q<br />
D.NADH</p>
<p>正確答案:<br />
B. cytochrome c</p>
<p>為何正確:<br />
在粒線體電子傳遞鏈中，cytochrome c 是 complex IV 的主要電子供應者。cytochrome c 是一種可溶性蛋白質，位於內膜的膜間空隙中，負責將電子從 complex III 傳遞到 complex IV (cytochrome c oxidase)，使氧氣還原成水，並推動電子傳遞鏈的進行。</p>
<p>選項:&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-730"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b2%92%e7%b7%9a%e9%ab%94%e9%9b%bb%e5%ad%90%e5%82%b3%e9%81%9e%e9%8f%88-complex-iv-%e7%9a%84%e9%9b%bb%e5%ad%90%e4%be%9b%e6%87%89%e8%80%85%e6%98%af%e7%b4%b0%e8%83%9e%e8%89%b2%e7%b4%a0ccytochrome-c/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">e3c4d30bf72394f143fffbd55f7c87fc</guid>
				<title>MedicsKey.A started the discussion 肌肉組織中代謝產生的氨（ammonia）會以丙胺酸（alanine）形式攜帶進入肝臟進行代謝。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%82%8c%e8%82%89%e7%b5%84%e7%b9%94%e4%b8%ad%e4%bb%a3%e8%ac%9d%e7%94%a2%e7%94%9f%e7%9a%84%e6%b0%a8%ef%bc%88ammonia%ef%bc%89%e6%9c%83%e4%bb%a5%e4%b8%99%e8%83%ba%e9%85%b8%ef%bc%88alanine%ef%bc%89/</link>
				<pubDate>Wed, 08 Jan 2025 14:16:20 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%82%8c%e8%82%89%e7%b5%84%e7%b9%94%e4%b8%ad%e4%bb%a3%e8%ac%9d%e7%94%a2%e7%94%9f%e7%9a%84%e6%b0%a8%ef%bc%88ammonia%ef%bc%89%e6%9c%83%e4%bb%a5%e4%b8%99%e8%83%ba%e9%85%b8%ef%bc%88alanine%ef%bc%89/">肌肉組織中代謝產生的氨（ammonia）會以丙胺酸（alanine）形式攜帶進入肝臟進行代謝。</a></p> <div class="bb-content-inr-wrap"><p>11211-95 生化<br />
95.胺基酸在肌肉組織中代謝產生的氨（ammonia）會再以何種胺基酸型式攜帶進入肝臟進行代謝？<br />
A.離胺酸（lysine）<br />
B.瓜胺酸（citrulline）<br />
C.精胺酸（arginine）<br />
D.丙胺酸（alanine）</p>
<p>正確答案: D. 丙胺酸（alanine）</p>
<p>為何正確: 氨（ammonia）在肌肉中經常以丙胺酸（alanine）的形式被運輸到肝臟。這是因為丙胺酸可以通過丙酮酸（pyruvate）的氨基轉移作用從谷氨酸（glutamate）形成。然後，丙胺酸經由血流運送到肝臟，在肝臟中再經過氨基轉移作用轉換回丙酮酸，同時釋放出氨供尿素循環（urea&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-729"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%82%8c%e8%82%89%e7%b5%84%e7%b9%94%e4%b8%ad%e4%bb%a3%e8%ac%9d%e7%94%a2%e7%94%9f%e7%9a%84%e6%b0%a8%ef%bc%88ammonia%ef%bc%89%e6%9c%83%e4%bb%a5%e4%b8%99%e8%83%ba%e9%85%b8%ef%bc%88alanine%ef%bc%89/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">4f1dffdc3b37a1cc7434e77b38a3a14c</guid>
				<title>MedicsKey.A started the discussion 血基質（heme）合成的最終步驟是在粒線體中完成。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%a1%80%e5%9f%ba%e8%b3%aa%ef%bc%88heme%ef%bc%89%e5%90%88%e6%88%90%e7%9a%84%e6%9c%80%e7%b5%82%e6%ad%a5%e9%a9%9f%e6%98%af%e5%9c%a8%e7%b2%92%e7%b7%9a%e9%ab%94%e4%b8%ad%e5%ae%8c%e6%88%90%e3%80%82/</link>
				<pubDate>Wed, 08 Jan 2025 14:10:49 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%a1%80%e5%9f%ba%e8%b3%aa%ef%bc%88heme%ef%bc%89%e5%90%88%e6%88%90%e7%9a%84%e6%9c%80%e7%b5%82%e6%ad%a5%e9%a9%9f%e6%98%af%e5%9c%a8%e7%b2%92%e7%b7%9a%e9%ab%94%e4%b8%ad%e5%ae%8c%e6%88%90%e3%80%82/">血基質（heme）合成的最終步驟是在粒線體中完成。</a></p> <div class="bb-content-inr-wrap"><p>11211-94 生化<br />
94.下列有關琥珀酸–甘胺酸路徑（succinate-glycine pathway）的敘述，何者錯誤？<br />
A.此路徑作用的第一個酵素為δ-aminolevulinic acid synthase（ALA synthase）<br />
B.血基質（heme）中的碳原子來自琥珀酸（succinate）及甘胺酸（glycine）<br />
C.需要磷酸吡哆醛（pyridoxal phosphate）參與作用<br />
D.血基質（heme）合成在細胞質中完成</p>
<p>正確答案: D.血基質（heme）合成在細胞質中完成</p>
<p>為何正確: 血基質（heme）合成的最後步驟並非在細胞質中完成，而是在粒線體中完成。琥珀酸–甘胺酸路徑（succinate-glycine&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-728"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%a1%80%e5%9f%ba%e8%b3%aa%ef%bc%88heme%ef%bc%89%e5%90%88%e6%88%90%e7%9a%84%e6%9c%80%e7%b5%82%e6%ad%a5%e9%a9%9f%e6%98%af%e5%9c%a8%e7%b2%92%e7%b7%9a%e9%ab%94%e4%b8%ad%e5%ae%8c%e6%88%90%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">f959293a3e7c5767254b6a37fad95a7c</guid>
				<title>MedicsKey.A started the discussion Tay-Sachs disease 的致病機轉主要是在溶酶體（lysosome）中 ganglioside 無法被分解。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/tay-sachs-disease-%e7%9a%84%e8%87%b4%e7%97%85%e6%a9%9f%e8%bd%89%e4%b8%bb%e8%a6%81%e6%98%af%e5%9c%a8%e6%ba%b6%e9%85%b6%e9%ab%94%ef%bc%88lysosome%ef%bc%89%e4%b8%ad-ganglioside-%e7%84%a1%e6%b3%95/</link>
				<pubDate>Wed, 08 Jan 2025 10:19:20 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/tay-sachs-disease-%e7%9a%84%e8%87%b4%e7%97%85%e6%a9%9f%e8%bd%89%e4%b8%bb%e8%a6%81%e6%98%af%e5%9c%a8%e6%ba%b6%e9%85%b6%e9%ab%94%ef%bc%88lysosome%ef%bc%89%e4%b8%ad-ganglioside-%e7%84%a1%e6%b3%95/">Tay-Sachs disease 的致病機轉主要是在溶酶體（lysosome）中 ganglioside 無法被分解。</a></p> <div class="bb-content-inr-wrap"><p>11211- 93 生化<br />
93.Tay-Sachs disease 屬於一種 sphingolipidoses，關於此疾病下列敘述何者錯誤？<br />
A.屬於 lipid storage disease<br />
B.導致神經系統退化<br />
C.致病機轉主要是由於 ganglioside 無法在 endoplasmic reticulum 中分解<br />
D.由 lysosomal N-acetylhexosaminidase A 功能缺失引起</p>
<p>正確答案: C</p>
<p>為何正確: Tay-Sachs disease 的致病機轉主要是因為 ganglioside 無法在溶酶體（lysosome）中分解，而非在內質網（endoplasmic reticulum）。這是由於溶酶體內的&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-727"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/tay-sachs-disease-%e7%9a%84%e8%87%b4%e7%97%85%e6%a9%9f%e8%bd%89%e4%b8%bb%e8%a6%81%e6%98%af%e5%9c%a8%e6%ba%b6%e9%85%b6%e9%ab%94%ef%bc%88lysosome%ef%bc%89%e4%b8%ad-ganglioside-%e7%84%a1%e6%b3%95/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">9e8488d5b581d4333db4f081fdbe8f51</guid>
				<title>MedicsKey.A started the discussion 家族性高膽固醇症（familial hypercholesterolemia）是由於低密度脂蛋白受體（LDL receptor）功能缺失或不足所致，而非過度表達。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%ae%b6%e6%97%8f%e6%80%a7%e9%ab%98%e8%86%bd%e5%9b%ba%e9%86%87%e7%97%87%ef%bc%88familial-hypercholesterolemia%ef%bc%89%e6%98%af%e7%94%b1%e6%96%bc%e4%bd%8e%e5%af%86%e5%ba%a6%e8%84%82%e8%9b%8b%e7%99%bd/</link>
				<pubDate>Wed, 08 Jan 2025 10:15:17 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%ae%b6%e6%97%8f%e6%80%a7%e9%ab%98%e8%86%bd%e5%9b%ba%e9%86%87%e7%97%87%ef%bc%88familial-hypercholesterolemia%ef%bc%89%e6%98%af%e7%94%b1%e6%96%bc%e4%bd%8e%e5%af%86%e5%ba%a6%e8%84%82%e8%9b%8b%e7%99%bd/">家族性高膽固醇症（familial hypercholesterolemia）是由於低密度脂蛋白受體（LDL receptor）功能缺失或不足所致，而非過度表達。</a></p> <div class="bb-content-inr-wrap"><p>11211- 92 生化<br />
92.有關家族性高膽固醇症（familial hypercholesterolemia）的敘述，下列何者最不正確？<br />
A.LDL receptor 過度表達<br />
B.LDL 的濃度太高<br />
C.LDL receptor 基因突變<br />
D.LDL receptor 運送到細胞膜過程受阻</p>
<p>正確答案: A.LDL receptor 過度表達</p>
<p>為何正確: 家族性高膽固醇症（familial hypercholesterolemia）是由於低密度脂蛋白受器（LDL receptor）基因的突變所導致的，這會導致LDL不能被正常清除，因此血液中的LDL濃度升高。而選項A「LDL receptor&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-726"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%ae%b6%e6%97%8f%e6%80%a7%e9%ab%98%e8%86%bd%e5%9b%ba%e9%86%87%e7%97%87%ef%bc%88familial-hypercholesterolemia%ef%bc%89%e6%98%af%e7%94%b1%e6%96%bc%e4%bd%8e%e5%af%86%e5%ba%a6%e8%84%82%e8%9b%8b%e7%99%bd/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">317544f1c93ee116707127d39727f234</guid>
				<title>MedicsKey.A started the discussion 在 cerebroside 合成過程中，UDP（尿苷二磷酸，UDP）攜帶葡萄糖參與 ceramide 轉成 cerebroside 的反應。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8-cerebroside-%e5%90%88%e6%88%90%e9%81%8e%e7%a8%8b%e4%b8%ad%ef%bc%8cudp%ef%bc%88%e5%b0%bf%e8%8b%b7%e4%ba%8c%e7%a3%b7%e9%85%b8%ef%bc%8cudp%ef%bc%89%e6%94%9c%e5%b8%b6%e8%91%a1%e8%90%84%e7%b3%96/</link>
				<pubDate>Wed, 08 Jan 2025 10:13:22 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8-cerebroside-%e5%90%88%e6%88%90%e9%81%8e%e7%a8%8b%e4%b8%ad%ef%bc%8cudp%ef%bc%88%e5%b0%bf%e8%8b%b7%e4%ba%8c%e7%a3%b7%e9%85%b8%ef%bc%8cudp%ef%bc%89%e6%94%9c%e5%b8%b6%e8%91%a1%e8%90%84%e7%b3%96/">在 cerebroside 合成過程中，UDP（尿苷二磷酸，UDP）攜帶葡萄糖參與 ceramide 轉成 cerebroside 的反應。</a></p> <div class="bb-content-inr-wrap"><p>11211- 91 生化<br />
91.在 cerebroside 合成過程中，下列何者攜帶 glucose 參與 ceramide 轉成 cerebroside 的反應？<br />
A.CDP<br />
B.UDP<br />
C.GDP<br />
D.ADP</p>
<p>正確答案: B.UDP</p>
<p>為何正確: 在 cerebroside 合成過程中，UDP (Uridine Diphosphate) 是攜帶 glucose 的主要分子，用於將 glucose 加到 ceramide 上，形成 cerebroside。UDP-glucose 是這個轉化過程中的糖基供體，因此是正確的選擇。</p>
<p>選項: A.CDP<br />
詳解:&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-725"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8-cerebroside-%e5%90%88%e6%88%90%e9%81%8e%e7%a8%8b%e4%b8%ad%ef%bc%8cudp%ef%bc%88%e5%b0%bf%e8%8b%b7%e4%ba%8c%e7%a3%b7%e9%85%b8%ef%bc%8cudp%ef%bc%89%e6%94%9c%e5%b8%b6%e8%91%a1%e8%90%84%e7%b3%96/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">97bc7cf4415ff89f550ce9adfa03f85a</guid>
				<title>MedicsKey.A started the discussion N-linked醣基化發生在天門冬醯胺（asparagine）的胺基酸殘基上。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/n-linked%e9%86%a3%e5%9f%ba%e5%8c%96%e7%99%bc%e7%94%9f%e5%9c%a8%e5%a4%a9%e9%96%80%e5%86%ac%e9%86%af%e8%83%ba%ef%bc%88asparagine%ef%bc%89%e7%9a%84%e8%83%ba%e5%9f%ba%e9%85%b8%e6%ae%98%e5%9f%ba%e4%b8%8a/</link>
				<pubDate>Wed, 08 Jan 2025 10:01:29 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/n-linked%e9%86%a3%e5%9f%ba%e5%8c%96%e7%99%bc%e7%94%9f%e5%9c%a8%e5%a4%a9%e9%96%80%e5%86%ac%e9%86%af%e8%83%ba%ef%bc%88asparagine%ef%bc%89%e7%9a%84%e8%83%ba%e5%9f%ba%e9%85%b8%e6%ae%98%e5%9f%ba%e4%b8%8a/">N-linked醣基化發生在天門冬醯胺（asparagine）的胺基酸殘基上。</a></p> <div class="bb-content-inr-wrap"><p>11211- 89 生化<br />
89.醣基化是蛋白質上常見的一種轉譯後修飾，有 N-linked 與 O-linked 兩種主要的鍵結方式，其中 N-linked 主要是透過與蛋白質上的何種胺基酸結合？<br />
A.絲胺酸（serine）<br />
B.酪胺酸（tyrosine）<br />
C.天門冬醯胺（asparagine）<br />
D.天門冬胺酸（aspartate）</p>
<p>正確答案: C.天門冬醯胺（asparagine）</p>
<p>為何正確: N-linked 醣基化是指糖分子透過N-醣苷鍵結（N-glycosidic bond）與蛋白質上的天門冬醯胺（asparagine）殘基的氮原子結合，這是蛋白質轉譯後修飾中最常見的一種方式。此過程通常在內質網（endoplasmic&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-724"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/n-linked%e9%86%a3%e5%9f%ba%e5%8c%96%e7%99%bc%e7%94%9f%e5%9c%a8%e5%a4%a9%e9%96%80%e5%86%ac%e9%86%af%e8%83%ba%ef%bc%88asparagine%ef%bc%89%e7%9a%84%e8%83%ba%e5%9f%ba%e9%85%b8%e6%ae%98%e5%9f%ba%e4%b8%8a/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">e825cbb0bfc44b3d440955a4ac9f9cf7</guid>
				<title>MedicsKey.A started the discussion 糖解作用（glycolysis）中唯一將電子轉移給NAD+的氧化還原反應由三磷酸甘油醛脫氫酶（glyceraldehyde-3-phosphate dehydrogenase）催化。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b3%96%e8%a7%a3%e4%bd%9c%e7%94%a8%ef%bc%88glycolysis%ef%bc%89%e4%b8%ad%e5%94%af%e4%b8%80%e5%b0%87%e9%9b%bb%e5%ad%90%e8%bd%89%e7%a7%bb%e7%b5%a6nad%e7%9a%84%e6%b0%a7%e5%8c%96%e9%82%84%e5%8e%9f/</link>
				<pubDate>Wed, 08 Jan 2025 09:31:18 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b3%96%e8%a7%a3%e4%bd%9c%e7%94%a8%ef%bc%88glycolysis%ef%bc%89%e4%b8%ad%e5%94%af%e4%b8%80%e5%b0%87%e9%9b%bb%e5%ad%90%e8%bd%89%e7%a7%bb%e7%b5%a6nad%e7%9a%84%e6%b0%a7%e5%8c%96%e9%82%84%e5%8e%9f/">糖解作用（glycolysis）中唯一將電子轉移給NAD+的氧化還原反應由三磷酸甘油醛脫氫酶（glyceraldehyde-3-phosphate dehydrogenase）催化。</a></p> <div class="bb-content-inr-wrap"><p>11211- 88 生化<br />
88.下列那一個酵素所催化的反應為糖解作用（glycolysis）中唯一將電子轉移給 NAD+之氧化還原反應？<br />
A.enolase<br />
B.glyceraldehyde-3-phosphate dehydrogenase<br />
C.pyruvate dehydrogenase<br />
D.pyruvate kinase</p>
<p>正確答案: B. glyceraldehyde-3-phosphate dehydrogenase</p>
<p>為何正確: 在糖解作用（glycolysis）中，glyceraldehyde-3-phosphate dehydrogenase 是催化反應中唯一將電子轉移給 NAD+ 的酵素。該酵素催化&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-723"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b3%96%e8%a7%a3%e4%bd%9c%e7%94%a8%ef%bc%88glycolysis%ef%bc%89%e4%b8%ad%e5%94%af%e4%b8%80%e5%b0%87%e9%9b%bb%e5%ad%90%e8%bd%89%e7%a7%bb%e7%b5%a6nad%e7%9a%84%e6%b0%a7%e5%8c%96%e9%82%84%e5%8e%9f/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">1806bedfc889da31f884ae86d24b2ed6</guid>
				<title>MedicsKey.A started the discussion 胺醯-tRNA 合成酶(aminoacyl-tRNA synthetases)對每一種胺基酸及其對應的tRNA具有高度專一性。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%ba%e9%86%af-trna-%e5%90%88%e6%88%90%e9%85%b6aminoacyl-trna-synthetases%e5%b0%8d%e6%af%8f%e4%b8%80%e7%a8%ae%e8%83%ba%e5%9f%ba%e9%85%b8%e5%8f%8a%e5%85%b6%e5%b0%8d%e6%87%89%e7%9a%84trna%e5%85%b7/</link>
				<pubDate>Wed, 08 Jan 2025 09:26:19 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%ba%e9%86%af-trna-%e5%90%88%e6%88%90%e9%85%b6aminoacyl-trna-synthetases%e5%b0%8d%e6%af%8f%e4%b8%80%e7%a8%ae%e8%83%ba%e5%9f%ba%e9%85%b8%e5%8f%8a%e5%85%b6%e5%b0%8d%e6%87%89%e7%9a%84trna%e5%85%b7/">胺醯-tRNA 合成酶(aminoacyl-tRNA synthetases)對每一種胺基酸及其對應的tRNA具有高度專一性。</a></p> <div class="bb-content-inr-wrap"><p>11211- 87 生化<br />
87.下列何者是胺醯-tRNA 合成酶（aminoacyl-tRNA synthetases）的錯誤詮釋？<br />
A.可將胺基酸接到 tRNA 的 3&#8217;端<br />
B.反應中可將 ATP 分解，並釋出焦磷酸根（PPi）<br />
C.對每一種胺基酸的特異性很高，但可接受任何一種 tRNA 作為受質（substrate）<br />
D.多數生物體中，對每一種胺基酸皆有其專一的胺醯-tRNA 合成酶</p>
<p>正確答案: C.對每一種胺基酸的特異性很高，但可接受任何一種 tRNA 作為受質（substrate）</p>
<p>為何正確: 胺醯-tRNA&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-722"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%ba%e9%86%af-trna-%e5%90%88%e6%88%90%e9%85%b6aminoacyl-trna-synthetases%e5%b0%8d%e6%af%8f%e4%b8%80%e7%a8%ae%e8%83%ba%e5%9f%ba%e9%85%b8%e5%8f%8a%e5%85%b6%e5%b0%8d%e6%87%89%e7%9a%84trna%e5%85%b7/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">653e3517f9c874049b0474d021113421</guid>
				<title>MedicsKey.A started the discussion 5&#039; 端的加帽（capping）修飾主要在真核細胞的細胞核內進行。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/5-%e7%ab%af%e7%9a%84%e5%8a%a0%e5%b8%bd%ef%bc%88capping%ef%bc%89%e4%bf%ae%e9%a3%be%e4%b8%bb%e8%a6%81%e5%9c%a8%e7%9c%9f%e6%a0%b8%e7%b4%b0%e8%83%9e%e7%9a%84%e7%b4%b0%e8%83%9e%e6%a0%b8%e5%85%a7%e9%80%b2/</link>
				<pubDate>Wed, 08 Jan 2025 09:13:18 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/5-%e7%ab%af%e7%9a%84%e5%8a%a0%e5%b8%bd%ef%bc%88capping%ef%bc%89%e4%bf%ae%e9%a3%be%e4%b8%bb%e8%a6%81%e5%9c%a8%e7%9c%9f%e6%a0%b8%e7%b4%b0%e8%83%9e%e7%9a%84%e7%b4%b0%e8%83%9e%e6%a0%b8%e5%85%a7%e9%80%b2/">5' 端的加帽（capping）修飾主要在真核細胞的細胞核內進行。</a></p> <div class="bb-content-inr-wrap"><p>11211- 86 生化<br />
86.下列關於真核細胞中，mRNA 在 5&#8242; 端會經過加帽（capping）修飾的敘述，何者錯誤？<br />
A.可保護 mRNA 不被核酸外切酶（exonuclease）所水解<br />
B.可被 eIF4E 辨識<br />
C.可幫助 mRNA 之轉譯（translation）<br />
D.修飾反應主要發生於內質網（ER）及高基氏體（Golgi apparatus）內</p>
<p>正確答案: D.修飾反應主要發生於內質網（ER）及高基氏體（Golgi apparatus）內</p>
<p>為何正確: mRNA 的加帽（capping）修飾反應主要發生在細胞核內，而不是在內質網（ER）或高基氏體（Golgi apparatus）。加帽修飾發生在 mRNA&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-721"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/5-%e7%ab%af%e7%9a%84%e5%8a%a0%e5%b8%bd%ef%bc%88capping%ef%bc%89%e4%bf%ae%e9%a3%be%e4%b8%bb%e8%a6%81%e5%9c%a8%e7%9c%9f%e6%a0%b8%e7%b4%b0%e8%83%9e%e7%9a%84%e7%b4%b0%e8%83%9e%e6%a0%b8%e5%85%a7%e9%80%b2/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">28a6890424ef4fb47b27f2d49f4ba6e7</guid>
				<title>MedicsKey.A started the discussion 小分子物質在原核細胞中通常不會直接結合到DNA來調節基因轉錄起始。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%b0%8f%e5%88%86%e5%ad%90%e7%89%a9%e8%b3%aa%e5%9c%a8%e5%8e%9f%e6%a0%b8%e7%b4%b0%e8%83%9e%e4%b8%ad%e9%80%9a%e5%b8%b8%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e5%88%b0dna%e4%be%86/</link>
				<pubDate>Wed, 08 Jan 2025 09:05:19 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%b0%8f%e5%88%86%e5%ad%90%e7%89%a9%e8%b3%aa%e5%9c%a8%e5%8e%9f%e6%a0%b8%e7%b4%b0%e8%83%9e%e4%b8%ad%e9%80%9a%e5%b8%b8%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e5%88%b0dna%e4%be%86/">小分子物質在原核細胞中通常不會直接結合到DNA來調節基因轉錄起始。</a></p> <div class="bb-content-inr-wrap"><p>11211- 85 生化<br />
85.小分子物質在原核細胞中調節基因轉錄起始，通常不是藉由下列何種作用機轉？<br />
A.直接結合到 DNA<br />
B.調控活化子（activator）與 DNA 的結合<br />
C.改變抑制子（repressor）的蛋白質構型（conformation）<br />
D.調控抑制子（repressor）與 DNA 的結合</p>
<p>正確答案: A.直接結合到 DNA</p>
<p>為何正確: 小分子物質在原核細胞中調節基因轉錄起始時，通常是通過調控活化子（activator）與 DNA 的結合、改變抑制子（repressor）的蛋白質構型（conformation），或者調控抑制子（repressor）與 DNA 的結合。這些小分子物質通常不會直接結合到 DNA 上來調控基因的表現，因此選項A「直接結合到&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-720"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%b0%8f%e5%88%86%e5%ad%90%e7%89%a9%e8%b3%aa%e5%9c%a8%e5%8e%9f%e6%a0%b8%e7%b4%b0%e8%83%9e%e4%b8%ad%e9%80%9a%e5%b8%b8%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e5%88%b0dna%e4%be%86/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">9c13d9d073ad4a82aa98ad88cac56469</guid>
				<title>MedicsKey.A started the discussion 核糖體轉位（translocation）所需的能量是由GTP → GDP + Pi提供。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e6%a0%b8%e7%b3%96%e9%ab%94%e8%bd%89%e4%bd%8d%ef%bc%88translocation%ef%bc%89%e6%89%80%e9%9c%80%e7%9a%84%e8%83%bd%e9%87%8f%e6%98%af%e7%94%b1gtp-%e2%86%92-gdp-pi%e6%8f%90%e4%be%9b%e3%80%82/</link>
				<pubDate>Wed, 08 Jan 2025 09:02:18 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e6%a0%b8%e7%b3%96%e9%ab%94%e8%bd%89%e4%bd%8d%ef%bc%88translocation%ef%bc%89%e6%89%80%e9%9c%80%e7%9a%84%e8%83%bd%e9%87%8f%e6%98%af%e7%94%b1gtp-%e2%86%92-gdp-pi%e6%8f%90%e4%be%9b%e3%80%82/">核糖體轉位（translocation）所需的能量是由GTP → GDP + Pi提供。</a></p> <div class="bb-content-inr-wrap"><p>11211- 84 生化<br />
84.三磷酸核苷（nucleoside triphosphate）是細胞內生化反應重要的能量來源，在蛋白質轉譯的過程中，核糖體轉位（translocation）所需的能量是由下列何者提供？<br />
A.ATP → ADP + Pi<br />
B.GTP → GDP + Pi<br />
C.ATP → AMP + PPi<br />
D.GTP → GMP + PPi</p>
<p>正確答案:<br />
B.GTP → GDP +&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-719"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e6%a0%b8%e7%b3%96%e9%ab%94%e8%bd%89%e4%bd%8d%ef%bc%88translocation%ef%bc%89%e6%89%80%e9%9c%80%e7%9a%84%e8%83%bd%e9%87%8f%e6%98%af%e7%94%b1gtp-%e2%86%92-gdp-pi%e6%8f%90%e4%be%9b%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">499d91f6e8fd5cedac3a3b1091e285d6</guid>
				<title>MedicsKey.A started the discussion 原核生物中核苷酸去除修復（nucleotide excision repair）的主要酵素是Uvr A、B、C。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%8e%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e4%b8%ad%e6%a0%b8%e8%8b%b7%e9%85%b8%e5%8e%bb%e9%99%a4%e4%bf%ae%e5%be%a9%ef%bc%88nucleotide-excision-repair%ef%bc%89%e7%9a%84%e4%b8%bb%e8%a6%81%e9%85%b5%e7%b4%a0/</link>
				<pubDate>Wed, 08 Jan 2025 08:39:20 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%8e%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e4%b8%ad%e6%a0%b8%e8%8b%b7%e9%85%b8%e5%8e%bb%e9%99%a4%e4%bf%ae%e5%be%a9%ef%bc%88nucleotide-excision-repair%ef%bc%89%e7%9a%84%e4%b8%bb%e8%a6%81%e9%85%b5%e7%b4%a0/">原核生物中核苷酸去除修復（nucleotide excision repair）的主要酵素是Uvr A、B、C。</a></p> <div class="bb-content-inr-wrap"><p>11211- 83 生化<br />
83.下列何者是原核生物中核苷酸去除修復（nucleotide excision repair）過程的主要酵素？<br />
A.Ruv A, B, C<br />
B.Uvr A, B, C<br />
C.Rec A, Lex A, Rec BCD<br />
D.Polymerase α, β, γ, δ</p>
<p>正確答案: B.Uvr A, B, C<br />
為何正確: 在原核生物中，核苷酸去除修復（nucleotide excision repair）過程的主要酵素是Uvr A, B,&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-718"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%8e%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e4%b8%ad%e6%a0%b8%e8%8b%b7%e9%85%b8%e5%8e%bb%e9%99%a4%e4%bf%ae%e5%be%a9%ef%bc%88nucleotide-excision-repair%ef%bc%89%e7%9a%84%e4%b8%bb%e8%a6%81%e9%85%b5%e7%b4%a0/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">06736dd104b722c67f0e71a1046192d8</guid>
				<title>MedicsKey.A started the discussion 反轉錄酶（reverse transcriptase）主要作用是以 RNA 為模板合成 DNA。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%8f%8d%e8%bd%89%e9%8c%84%e9%85%b6%ef%bc%88reverse-transcriptase%ef%bc%89%e4%b8%bb%e8%a6%81%e4%bd%9c%e7%94%a8%e6%98%af%e4%bb%a5-rna-%e7%82%ba%e6%a8%a1%e6%9d%bf%e5%90%88%e6%88%90-dna%e3%80%82/</link>
				<pubDate>Wed, 08 Jan 2025 08:26:17 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%8f%8d%e8%bd%89%e9%8c%84%e9%85%b6%ef%bc%88reverse-transcriptase%ef%bc%89%e4%b8%bb%e8%a6%81%e4%bd%9c%e7%94%a8%e6%98%af%e4%bb%a5-rna-%e7%82%ba%e6%a8%a1%e6%9d%bf%e5%90%88%e6%88%90-dna%e3%80%82/">反轉錄酶（reverse transcriptase）主要作用是以 RNA 為模板合成 DNA。</a></p> <div class="bb-content-inr-wrap"><p>11211- 82 生化<br />
82.反轉錄酶（reverse transcriptase）主要的作用為：<br />
A.以 DNA 為模板合成 DNA<br />
B.以 DNA 為模板合成 RNA<br />
C.以 RNA 為模板合成 DNA<br />
D.以 RNA 為模板合成 RNA</p>
<p>正確答案:<br />
C.以 RNA 為模板合成 DNA</p>
<p>為何正確:<br />
反轉錄酶（reverse transcriptase）是一種酶，主要功能是以 RNA 為模板合成 DNA。這種酶在逆轉錄病毒（如HIV）中具有關鍵作用，因為它能夠將病毒的RNA基因組轉錄成DNA，從而整合到宿主的基因組中作進一步的複製和表達。</p>
<p>選項: A<br />
詳解: 反轉錄酶的主要功能不是以 DNA 為模板合成 DNA。這種功能是由 DNA&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-717"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%8f%8d%e8%bd%89%e9%8c%84%e9%85%b6%ef%bc%88reverse-transcriptase%ef%bc%89%e4%b8%bb%e8%a6%81%e4%bd%9c%e7%94%a8%e6%98%af%e4%bb%a5-rna-%e7%82%ba%e6%a8%a1%e6%9d%bf%e5%90%88%e6%88%90-dna%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">8b946b449736ccd1a357e36450d8f8f1</guid>
				<title>MedicsKey.A started the discussion 大腸桿菌（E. coli）的DNA複製和真核生物的DNA複製皆需要RNA引子（primer）。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%a4%a7%e8%85%b8%e6%a1%bf%e8%8f%8c%ef%bc%88e-coli%ef%bc%89%e7%9a%84dna%e8%a4%87%e8%a3%bd%e5%92%8c%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%9a%84dna%e8%a4%87%e8%a3%bd%e7%9a%86%e9%9c%80%e8%a6%81rna/</link>
				<pubDate>Wed, 08 Jan 2025 08:20:20 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%a4%a7%e8%85%b8%e6%a1%bf%e8%8f%8c%ef%bc%88e-coli%ef%bc%89%e7%9a%84dna%e8%a4%87%e8%a3%bd%e5%92%8c%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%9a%84dna%e8%a4%87%e8%a3%bd%e7%9a%86%e9%9c%80%e8%a6%81rna/">大腸桿菌（E. coli）的DNA複製和真核生物的DNA複製皆需要RNA引子（primer）。</a></p> <div class="bb-content-inr-wrap"><p>11211- 81 生化<br />
81.下列關於 DNA 複製（DNA replication）的敘述，何者錯誤？<br />
A.大腸桿菌（E. coli）的 DNA 複製，只會利用一個複製起始點（replication origin）<br />
B.真核細胞的 DNA 複製，會利用多個複製起始點（replication origin）<br />
C.大腸桿菌（E. coli）染色體 DNA 的複製以雙個複製叉（replication fork）進行<br />
D.大腸桿菌（E. coli）的 DNA 複製需要利用 RNA 為引子（primer），真核生物的 DNA 複製則利用 DNA 為引子</p>
<p>正確答案: D. 大腸桿菌（E. coli）的 DNA 複製需要利用 RNA&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-716"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%a4%a7%e8%85%b8%e6%a1%bf%e8%8f%8c%ef%bc%88e-coli%ef%bc%89%e7%9a%84dna%e8%a4%87%e8%a3%bd%e5%92%8c%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%9a%84dna%e8%a4%87%e8%a3%bd%e7%9a%86%e9%9c%80%e8%a6%81rna/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">6f23ea72b006705796b6fa7f2e51cfb5</guid>
				<title>MedicsKey.A started the discussion 5-磷酸-α-D-核糖-1-焦磷酸（PRPP）是核苷酸重新合成路徑和補救合成路徑皆會使用的重要代謝物。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/5-%e7%a3%b7%e9%85%b8-%ce%b1-d-%e6%a0%b8%e7%b3%96-1-%e7%84%a6%e7%a3%b7%e9%85%b8%ef%bc%88prpp%ef%bc%89%e6%98%af%e6%a0%b8%e8%8b%b7%e9%85%b8%e9%87%8d%e6%96%b0%e5%90%88%e6%88%90%e8%b7%af%e5%be%91%e5%92%8c/</link>
				<pubDate>Wed, 08 Jan 2025 07:41:16 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/5-%e7%a3%b7%e9%85%b8-%ce%b1-d-%e6%a0%b8%e7%b3%96-1-%e7%84%a6%e7%a3%b7%e9%85%b8%ef%bc%88prpp%ef%bc%89%e6%98%af%e6%a0%b8%e8%8b%b7%e9%85%b8%e9%87%8d%e6%96%b0%e5%90%88%e6%88%90%e8%b7%af%e5%be%91%e5%92%8c/">5-磷酸-α-D-核糖-1-焦磷酸（PRPP）是核苷酸重新合成路徑和補救合成路徑皆會使用的重要代謝物。</a></p> <div class="bb-content-inr-wrap"><p>11211- 80 生化<br />
80.下列何者為核苷酸（nucleotide）重新合成路徑（de novo synthesis）及補救合成路徑（salvage pathway）皆會使用的重要代謝物？<br />
A.glycinamide ribonucleotide（GAR）<br />
B.5-phosphoribosylamine（PRA）<br />
C.formylglycinamide ribonucleotide（FGAR）<br />
D.5-phospho-α-D-ribosyl-1-pyrophosphate（PRPP）</p>
<p>正確答案:&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-715"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/5-%e7%a3%b7%e9%85%b8-%ce%b1-d-%e6%a0%b8%e7%b3%96-1-%e7%84%a6%e7%a3%b7%e9%85%b8%ef%bc%88prpp%ef%bc%89%e6%98%af%e6%a0%b8%e8%8b%b7%e9%85%b8%e9%87%8d%e6%96%b0%e5%90%88%e6%88%90%e8%b7%af%e5%be%91%e5%92%8c/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">1db8058c983b13d5dadcdbe4e36689d2</guid>
				<title>MedicsKey.A started the discussion 胸腺嘧啶（thymine）含有甲基（-CH3）基團，而尿嘧啶（uracil）沒有。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b8%e8%85%ba%e5%98%a7%e5%95%b6%ef%bc%88thymine%ef%bc%89%e5%90%ab%e6%9c%89%e7%94%b2%e5%9f%ba%ef%bc%88-ch3%ef%bc%89%e5%9f%ba%e5%9c%98%ef%bc%8c%e8%80%8c%e5%b0%bf%e5%98%a7%e5%95%b6%ef%bc%88uracil/</link>
				<pubDate>Wed, 08 Jan 2025 07:36:18 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b8%e8%85%ba%e5%98%a7%e5%95%b6%ef%bc%88thymine%ef%bc%89%e5%90%ab%e6%9c%89%e7%94%b2%e5%9f%ba%ef%bc%88-ch3%ef%bc%89%e5%9f%ba%e5%9c%98%ef%bc%8c%e8%80%8c%e5%b0%bf%e5%98%a7%e5%95%b6%ef%bc%88uracil/">胸腺嘧啶（thymine）含有甲基（-CH3）基團，而尿嘧啶（uracil）沒有。</a></p> <div class="bb-content-inr-wrap"><p>11211- 79 生化<br />
79.下列那一個官能基出現在胸腺嘧啶（thymine）而不出現在尿嘧啶（uracil）？<br />
A.去氧核糖（deoxyribose）<br />
B.甲基（-CH3）<br />
C.胺基（-NH2）<br />
D.核糖（ribose）</p>
<p>正確答案: B.甲基（-CH3）</p>
<p>為何正確: 胸腺嘧啶（thymine）和尿嘧啶（uracil）都是嘧啶類鹼基。唯一的結構差異在於胸腺嘧啶在其分子結構中含有一個甲基（-CH3）官能基，而尿嘧啶不含此官能基。這使得胸腺嘧啶和尿嘧啶在核酸中的角色和功能有所不同。</p>
<p>選項:&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-714"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b8%e8%85%ba%e5%98%a7%e5%95%b6%ef%bc%88thymine%ef%bc%89%e5%90%ab%e6%9c%89%e7%94%b2%e5%9f%ba%ef%bc%88-ch3%ef%bc%89%e5%9f%ba%e5%9c%98%ef%bc%8c%e8%80%8c%e5%b0%bf%e5%98%a7%e5%95%b6%ef%bc%88uracil/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">9c027c1a6308d6acfc1435a4290e40e4</guid>
				<title>MedicsKey.A started the discussion 輔酶 Q（coenzyme Q）不參與氮代謝（nitrogen metabolism）。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%bc%94%e9%85%b6-q%ef%bc%88coenzyme-q%ef%bc%89%e4%b8%8d%e5%8f%83%e8%88%87%e6%b0%ae%e4%bb%a3%e8%ac%9d%ef%bc%88nitrogen-metabolism%ef%bc%89%e3%80%82/</link>
				<pubDate>Wed, 08 Jan 2025 07:31:21 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%bc%94%e9%85%b6-q%ef%bc%88coenzyme-q%ef%bc%89%e4%b8%8d%e5%8f%83%e8%88%87%e6%b0%ae%e4%bb%a3%e8%ac%9d%ef%bc%88nitrogen-metabolism%ef%bc%89%e3%80%82/">輔酶 Q（coenzyme Q）不參與氮代謝（nitrogen metabolism）。</a></p> <div class="bb-content-inr-wrap"><p>11211- 78 生化<br />
78.參與氮代謝（nitrogen metabolism）所需的輔酶（coenzyme），下列何者除外？<br />
A.磷酸吡哆醛（pyridoxal phosphate, PLP）<br />
B.輔酶 Q（coenzyme Q）<br />
C.四氫葉酸輔酶（tetrahydrofolate coenzyme）<br />
D.B12輔酶（B12 coenzyme）</p>
<p>正確答案: B.輔酶 Q（coenzyme Q）</p>
<p>為何正確: 磷酸吡哆醛（pyridoxal phosphate, PLP）、四氫葉酸輔酶（tetrahydrofolate coenzyme）、以及B12輔酶（B12&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-713"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%bc%94%e9%85%b6-q%ef%bc%88coenzyme-q%ef%bc%89%e4%b8%8d%e5%8f%83%e8%88%87%e6%b0%ae%e4%bb%a3%e8%ac%9d%ef%bc%88nitrogen-metabolism%ef%bc%89%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">8f505f141df5920336e54b60450d2759</guid>
				<title>MedicsKey.A started the discussion 在肝細胞中，S-adenosyl-L-methionine (SAM) 是提供甲基使 phosphoethanolamine 轉換成 phosphocholine 的甲基供體。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e8%82%9d%e7%b4%b0%e8%83%9e%e4%b8%ad%ef%bc%8cs-adenosyl-l-methionine-sam-%e6%98%af%e6%8f%90%e4%be%9b%e7%94%b2%e5%9f%ba%e4%bd%bf-phosphoethanolamine-%e8%bd%89%e6%8f%9b%e6%88%90-phosphocholin/</link>
				<pubDate>Wed, 08 Jan 2025 07:26:19 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e8%82%9d%e7%b4%b0%e8%83%9e%e4%b8%ad%ef%bc%8cs-adenosyl-l-methionine-sam-%e6%98%af%e6%8f%90%e4%be%9b%e7%94%b2%e5%9f%ba%e4%bd%bf-phosphoethanolamine-%e8%bd%89%e6%8f%9b%e6%88%90-phosphocholin/">在肝細胞中，S-adenosyl-L-methionine (SAM) 是提供甲基使 phosphoethanolamine 轉換成 phosphocholine 的甲基供體。</a></p> <div class="bb-content-inr-wrap"><p>11211- 77 生化<br />
77.在人類肝細胞中提供甲基使 phosphoethanolamine 轉換成 phosphocholine 的是下列何者？<br />
A.methionine<br />
B.serine<br />
C.folic acid<br />
D.S-adenosyl-L-methionine</p>
<p>正確答案: D.S-adenosyl-L-methionine</p>
<p>為何正確: 在人類肝細胞中，S-adenosyl-L-methionine (SAM) 是主要的甲基供體，用於將磷酸乙醇胺 (phosphoethanolamine) 轉換為磷酸膽鹼 (phosphocholine)。SAM 經常被用於許多甲基化反應，是一個重要的甲基供體。</p>
<p>選項: A. methionine<br />
詳解:&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-712"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e8%82%9d%e7%b4%b0%e8%83%9e%e4%b8%ad%ef%bc%8cs-adenosyl-l-methionine-sam-%e6%98%af%e6%8f%90%e4%be%9b%e7%94%b2%e5%9f%ba%e4%bd%bf-phosphoethanolamine-%e8%bd%89%e6%8f%9b%e6%88%90-phosphocholin/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">7f3ad94b510a9a3c6949957f89b10fec</guid>
				<title>MedicsKey.A started the discussion 當受質濃度遠低於米氏常數(Km)時，酵素的反應速率常數可近似為催化常數(kcat)與米氏常數(Km)的比值，即kcat/Km。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%95%b6%e5%8f%97%e8%b3%aa%e6%bf%83%e5%ba%a6%e9%81%a0%e4%bd%8e%e6%96%bc%e7%b1%b3%e6%b0%8f%e5%b8%b8%e6%95%b8km%e6%99%82%ef%bc%8c%e9%85%b5%e7%b4%a0%e7%9a%84%e5%8f%8d%e6%87%89%e9%80%9f%e7%8e%87/</link>
				<pubDate>Wed, 08 Jan 2025 07:18:22 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%95%b6%e5%8f%97%e8%b3%aa%e6%bf%83%e5%ba%a6%e9%81%a0%e4%bd%8e%e6%96%bc%e7%b1%b3%e6%b0%8f%e5%b8%b8%e6%95%b8km%e6%99%82%ef%bc%8c%e9%85%b5%e7%b4%a0%e7%9a%84%e5%8f%8d%e6%87%89%e9%80%9f%e7%8e%87/">當受質濃度遠低於米氏常數(Km)時，酵素的反應速率常數可近似為催化常數(kcat)與米氏常數(Km)的比值，即kcat/Km。</a></p> <div class="bb-content-inr-wrap"><p>11211- 76 生化<br />
76.某酵素的 Km=10 mM， kcat=1000 s-1，當受質濃度為 0.01 mM 時，該酵素催化反應所展現的反應速率常數（rateconstant）最接近下列何者？<br />
A.1,000 s-1<br />
B.10,000 mM s-1<br />
C.10 mM s-1<br />
D.100 mM-1</p>
<p>正確答案: D. 100 mM-1</p>
<p>為何正確: 當受質濃度遠小於 Km (米氏常數，Michaelis constant) 時，酵素反應的速率常數可以用 kcat/Km 來近似計算。根據題目中提供的 Km=10 mM 和 kcat=1000 s-1，可以計算出 kcat/Km = 1000 s-1 / 10 mM = 100 mM-1 s-1，因此最接近的選項為 100&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-711"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%95%b6%e5%8f%97%e8%b3%aa%e6%bf%83%e5%ba%a6%e9%81%a0%e4%bd%8e%e6%96%bc%e7%b1%b3%e6%b0%8f%e5%b8%b8%e6%95%b8km%e6%99%82%ef%bc%8c%e9%85%b5%e7%b4%a0%e7%9a%84%e5%8f%8d%e6%87%89%e9%80%9f%e7%8e%87/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">9ca0333da5670337320e4376b3f9e71a</guid>
				<title>MedicsKey.A started the discussion α螺旋（α helix）在自然界中大部分是右手性（right-handed）的結構，氫鍵（hydrogen bond）形成對於α螺旋與β摺板（β sheet）的穩定性都非常重要，而β摺板中相鄰的多肽鏈（polypeptide chains）可以是平行（parallel）或反平行（antiparallel）的關係。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%ce%b1%e8%9e%ba%e6%97%8b%ef%bc%88%ce%b1-helix%ef%bc%89%e5%9c%a8%e8%87%aa%e7%84%b6%e7%95%8c%e4%b8%ad%e5%a4%a7%e9%83%a8%e5%88%86%e6%98%af%e5%8f%b3%e6%89%8b%e6%80%a7%ef%bc%88right-handed%ef%bc%89/</link>
				<pubDate>Wed, 08 Jan 2025 07:13:26 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%ce%b1%e8%9e%ba%e6%97%8b%ef%bc%88%ce%b1-helix%ef%bc%89%e5%9c%a8%e8%87%aa%e7%84%b6%e7%95%8c%e4%b8%ad%e5%a4%a7%e9%83%a8%e5%88%86%e6%98%af%e5%8f%b3%e6%89%8b%e6%80%a7%ef%bc%88right-handed%ef%bc%89/">α螺旋（α helix）在自然界中大部分是右手性（right-handed）的結構，氫鍵（hydrogen bond）形成對於α螺旋與β摺板（β sheet）的穩定性都非常重要，而β摺板中相鄰的多肽鏈（polypeptide chains）可以是平行（parallel）或反平行（antiparallel）的關係。</a></p> <div class="bb-content-inr-wrap"><p>11211- 75 生化<br />
下列關於蛋白質結構中α螺旋（α helix）與β摺板（β sheet）的敘述，何者正確？<br />
A.α螺旋的胺基端（amino terminus）會因電偶極（dipole）排列的規律性而帶部分負電性（partial negative charge）<br />
B.自然界中的α螺旋大部分具有左手性（left-handed）的結構<br />
C.氫鍵（hydrogen bond）的形成與α螺旋的穩定性有關，但與β摺板的穩定性無關<br />
D.β摺板中相鄰的兩條多肽鏈（polypeptide&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-710"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%ce%b1%e8%9e%ba%e6%97%8b%ef%bc%88%ce%b1-helix%ef%bc%89%e5%9c%a8%e8%87%aa%e7%84%b6%e7%95%8c%e4%b8%ad%e5%a4%a7%e9%83%a8%e5%88%86%e6%98%af%e5%8f%b3%e6%89%8b%e6%80%a7%ef%bc%88right-handed%ef%bc%89/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">2232cdc74842160bea9fbfea91b380d7</guid>
				<title>MedicsKey.A started the discussion 膠體過濾層析法（gel filtration chromatography）是根據分子大小（molecular size）的差異來分離蛋白質。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%86%a0%e9%ab%94%e9%81%8e%e6%bf%be%e5%b1%a4%e6%9e%90%e6%b3%95%ef%bc%88gel-filtration-chromatography%ef%bc%89%e6%98%af%e6%a0%b9%e6%93%9a%e5%88%86%e5%ad%90%e5%a4%a7%e5%b0%8f%ef%bc%88molecular-size/</link>
				<pubDate>Tue, 07 Jan 2025 16:43:18 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%86%a0%e9%ab%94%e9%81%8e%e6%bf%be%e5%b1%a4%e6%9e%90%e6%b3%95%ef%bc%88gel-filtration-chromatography%ef%bc%89%e6%98%af%e6%a0%b9%e6%93%9a%e5%88%86%e5%ad%90%e5%a4%a7%e5%b0%8f%ef%bc%88molecular-size/">膠體過濾層析法（gel filtration chromatography）是根據分子大小（molecular size）的差異來分離蛋白質。</a></p> <div class="bb-content-inr-wrap"><p>11211-74 生化<br />
74.蛋白質純化方法中的膠體過濾層析法（gel filtration chromatography），是根據不同蛋白質之間何項物理化學特性的差異達成分離效果？<br />
A.電性高低（charge）<br />
B.分子大小（molecular size）<br />
C.質荷比高低（mass-to-charge ratio）<br />
D.穩定程度（stability）</p>
<p>正確答案: B.分子大小（molecular size）<br />
為何正確: 膠體過濾層析法（gel filtration&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-709"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%86%a0%e9%ab%94%e9%81%8e%e6%bf%be%e5%b1%a4%e6%9e%90%e6%b3%95%ef%bc%88gel-filtration-chromatography%ef%bc%89%e6%98%af%e6%a0%b9%e6%93%9a%e5%88%86%e5%ad%90%e5%a4%a7%e5%b0%8f%ef%bc%88molecular-size/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">1a3e43633695d2472f72b37f87d0c76b</guid>
				<title>MedicsKey.A started the discussion 限制酶（restriction enzymes）是一種具序列特異性的DNA內切酶（endonuclease），能識別特定的DNA序列並在其位置切割DNA。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e9%99%90%e5%88%b6%e9%85%b6%ef%bc%88restriction-enzymes%ef%bc%89%e6%98%af%e4%b8%80%e7%a8%ae%e5%85%b7%e5%ba%8f%e5%88%97%e7%89%b9%e7%95%b0%e6%80%a7%e7%9a%84dna%e5%85%a7%e5%88%87%e9%85%b6%ef%bc%88endon-2/</link>
				<pubDate>Wed, 18 Dec 2024 16:13:23 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e9%99%90%e5%88%b6%e9%85%b6%ef%bc%88restriction-enzymes%ef%bc%89%e6%98%af%e4%b8%80%e7%a8%ae%e5%85%b7%e5%ba%8f%e5%88%97%e7%89%b9%e7%95%b0%e6%80%a7%e7%9a%84dna%e5%85%a7%e5%88%87%e9%85%b6%ef%bc%88endon-2/">限制酶（restriction enzymes）是一種具序列特異性的DNA內切酶（endonuclease），能識別特定的DNA序列並在其位置切割DNA。</a></p> <div class="bb-content-inr-wrap"><p>11221-100 生化<br />
100.下列有關限制酶（restriction enzymes）的描述，何者最適當？<br />
A.作用在胞膜上的通道，以限制某些病毒進入細胞<br />
B.具特異性的核糖核酸酶（ribonuclease），能在特定的生理狀況下降解mRNA<br />
C.是一種具序列特異性（sequence-specific）的DNA內切酶（endonuclease）<br />
D.能催化胺基酸與特異性的tRNA結合</p>
<p>正確答案: C.是一種具序列特異性（sequence-specific）的DNA內切酶（endonuclease）</p>
<p>為何正確: 限制酶（restriction&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-540"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e9%99%90%e5%88%b6%e9%85%b6%ef%bc%88restriction-enzymes%ef%bc%89%e6%98%af%e4%b8%80%e7%a8%ae%e5%85%b7%e5%ba%8f%e5%88%97%e7%89%b9%e7%95%b0%e6%80%a7%e7%9a%84dna%e5%85%a7%e5%88%87%e9%85%b6%ef%bc%88endon-2/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">4c2c528413e567f567086e0026d402bd</guid>
				<title>MedicsKey.A started the discussion 限制酶（restriction enzymes）是一種具序列特異性的DNA內切酶（endonuclease），能識別特定的DNA序列並在其位置切割DNA。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e9%99%90%e5%88%b6%e9%85%b6%ef%bc%88restriction-enzymes%ef%bc%89%e6%98%af%e4%b8%80%e7%a8%ae%e5%85%b7%e5%ba%8f%e5%88%97%e7%89%b9%e7%95%b0%e6%80%a7%e7%9a%84dna%e5%85%a7%e5%88%87%e9%85%b6%ef%bc%88endonuc/</link>
				<pubDate>Wed, 18 Dec 2024 16:13:22 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e9%99%90%e5%88%b6%e9%85%b6%ef%bc%88restriction-enzymes%ef%bc%89%e6%98%af%e4%b8%80%e7%a8%ae%e5%85%b7%e5%ba%8f%e5%88%97%e7%89%b9%e7%95%b0%e6%80%a7%e7%9a%84dna%e5%85%a7%e5%88%87%e9%85%b6%ef%bc%88endonuc/">限制酶（restriction enzymes）是一種具序列特異性的DNA內切酶（endonuclease），能識別特定的DNA序列並在其位置切割DNA。</a></p> <div class="bb-content-inr-wrap"><p>11221-100 生化<br />
100.下列有關限制酶（restriction enzymes）的描述，何者最適當？<br />
A.作用在胞膜上的通道，以限制某些病毒進入細胞<br />
B.具特異性的核糖核酸酶（ribonuclease），能在特定的生理狀況下降解mRNA<br />
C.是一種具序列特異性（sequence-specific）的DNA內切酶（endonuclease）<br />
D.能催化胺基酸與特異性的tRNA結合</p>
<p>正確答案: C.是一種具序列特異性（sequence-specific）的DNA內切酶（endonuclease）</p>
<p>為何正確: 限制酶（restriction&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-539"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e9%99%90%e5%88%b6%e9%85%b6%ef%bc%88restriction-enzymes%ef%bc%89%e6%98%af%e4%b8%80%e7%a8%ae%e5%85%b7%e5%ba%8f%e5%88%97%e7%89%b9%e7%95%b0%e6%80%a7%e7%9a%84dna%e5%85%a7%e5%88%87%e9%85%b6%ef%bc%88endonuc/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">b100f16a9ee0cab8d871fb0c9c8eec38</guid>
				<title>MedicsKey.A started the discussion 核糖核酸免疫沉澱（RNA immunoprecipitation, RIP）主要用於研究RNA與蛋白質的相互作用，而非直接測定RNA數量。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e6%a0%b8%e7%b3%96%e6%a0%b8%e9%85%b8%e5%85%8d%e7%96%ab%e6%b2%89%e6%be%b1%ef%bc%88rna-immunoprecipitation-rip%ef%bc%89%e4%b8%bb%e8%a6%81%e7%94%a8%e6%96%bc%e7%a0%94%e7%a9%b6rna%e8%88%87%e8%9b%8b-2/</link>
				<pubDate>Wed, 18 Dec 2024 16:10:22 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e6%a0%b8%e7%b3%96%e6%a0%b8%e9%85%b8%e5%85%8d%e7%96%ab%e6%b2%89%e6%be%b1%ef%bc%88rna-immunoprecipitation-rip%ef%bc%89%e4%b8%bb%e8%a6%81%e7%94%a8%e6%96%bc%e7%a0%94%e7%a9%b6rna%e8%88%87%e8%9b%8b-2/">核糖核酸免疫沉澱（RNA immunoprecipitation, RIP）主要用於研究RNA與蛋白質的相互作用，而非直接測定RNA數量。</a></p> <div class="bb-content-inr-wrap"><p>11221-99 生化<br />
99.下列何者最不可能被用來測定細胞中某一特殊核糖核酸（RNA）的數量？<br />
A.核糖核酸免疫沉澱（RNA immunoprecipitation）<br />
B.核糖核酸深度定序（RNA deep sequencing）<br />
C.核糖核酸微陣列（RNA microarray）<br />
D.反轉錄－即時聚合酶連鎖反應（reverse transcription-real time polymerase chain reaction）</p>
<p>正確答案: A.核糖核酸免疫沉澱（RNA immunoprecipitation）</p>
<p>為何正確: 核糖核酸免疫沉澱（RNA&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-538"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e6%a0%b8%e7%b3%96%e6%a0%b8%e9%85%b8%e5%85%8d%e7%96%ab%e6%b2%89%e6%be%b1%ef%bc%88rna-immunoprecipitation-rip%ef%bc%89%e4%b8%bb%e8%a6%81%e7%94%a8%e6%96%bc%e7%a0%94%e7%a9%b6rna%e8%88%87%e8%9b%8b-2/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">26d5d5cedb621b95eca47905ea62a3ca</guid>
				<title>MedicsKey.A started the discussion 核糖核酸免疫沉澱（RNA immunoprecipitation, RIP）主要用於研究RNA與蛋白質的相互作用，而非直接測定RNA數量。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e6%a0%b8%e7%b3%96%e6%a0%b8%e9%85%b8%e5%85%8d%e7%96%ab%e6%b2%89%e6%be%b1%ef%bc%88rna-immunoprecipitation-rip%ef%bc%89%e4%b8%bb%e8%a6%81%e7%94%a8%e6%96%bc%e7%a0%94%e7%a9%b6rna%e8%88%87%e8%9b%8b/</link>
				<pubDate>Wed, 18 Dec 2024 16:10:19 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e6%a0%b8%e7%b3%96%e6%a0%b8%e9%85%b8%e5%85%8d%e7%96%ab%e6%b2%89%e6%be%b1%ef%bc%88rna-immunoprecipitation-rip%ef%bc%89%e4%b8%bb%e8%a6%81%e7%94%a8%e6%96%bc%e7%a0%94%e7%a9%b6rna%e8%88%87%e8%9b%8b/">核糖核酸免疫沉澱（RNA immunoprecipitation, RIP）主要用於研究RNA與蛋白質的相互作用，而非直接測定RNA數量。</a></p> <div class="bb-content-inr-wrap"><p>11221-99 生化<br />
99.下列何者最不可能被用來測定細胞中某一特殊核糖核酸（RNA）的數量？<br />
A.核糖核酸免疫沉澱（RNA immunoprecipitation）<br />
B.核糖核酸深度定序（RNA deep sequencing）<br />
C.核糖核酸微陣列（RNA microarray）<br />
D.反轉錄－即時聚合酶連鎖反應（reverse transcription-real time polymerase chain reaction）</p>
<p>正確答案: A.核糖核酸免疫沉澱（RNA immunoprecipitation）</p>
<p>為何正確: 核糖核酸免疫沉澱（RNA&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-537"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e6%a0%b8%e7%b3%96%e6%a0%b8%e9%85%b8%e5%85%8d%e7%96%ab%e6%b2%89%e6%be%b1%ef%bc%88rna-immunoprecipitation-rip%ef%bc%89%e4%b8%bb%e8%a6%81%e7%94%a8%e6%96%bc%e7%a0%94%e7%a9%b6rna%e8%88%87%e8%9b%8b/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">bc1962ccec867f6949dd518ce484ed3f</guid>
				<title>MedicsKey.A started the discussion GTP酶活化蛋白（GTPase activator proteins, GAPs）主要作用於並調控Ras蛋白。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/gtp%e9%85%b6%e6%b4%bb%e5%8c%96%e8%9b%8b%e7%99%bd%ef%bc%88gtpase-activator-proteins-gaps%ef%bc%89%e4%b8%bb%e8%a6%81%e4%bd%9c%e7%94%a8%e6%96%bc%e4%b8%a6%e8%aa%bf%e6%8e%a7ras%e8%9b%8b%e7%99%bd%e3%80%82/</link>
				<pubDate>Wed, 18 Dec 2024 16:07:26 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/gtp%e9%85%b6%e6%b4%bb%e5%8c%96%e8%9b%8b%e7%99%bd%ef%bc%88gtpase-activator-proteins-gaps%ef%bc%89%e4%b8%bb%e8%a6%81%e4%bd%9c%e7%94%a8%e6%96%bc%e4%b8%a6%e8%aa%bf%e6%8e%a7ras%e8%9b%8b%e7%99%bd%e3%80%82/">GTP酶活化蛋白（GTPase activator proteins, GAPs）主要作用於並調控Ras蛋白。</a></p> <div class="bb-content-inr-wrap"><p>11221-98 生化<br />
98.GTP 酶活化蛋白（GTPase activator proteins, GAPs）最可能直接結合下列何者而調節訊息傳遞？<br />
A.環鳥苷單磷酸（cGMP）<br />
B.Ras 蛋白<br />
C.二醯基甘油（diacylglycerol）<br />
D.腺苷酸環化酶（adenylyl cyclase）</p>
<p>正確答案: B. Ras 蛋白</p>
<p>為何正確: GTP酶活化蛋白（GTPase activator proteins, GAPs）主要通過促進GTP水解來調節Ras蛋白，這是訊息傳遞過程中的關鍵步驟。Ras蛋白作為一種小型GTPase，在細胞的生長和分化中起重要作用，而GAPs則通過促進其GTP水解來調節其活性。</p>
<p>選項: B. Ras 蛋白<br />
詳解:&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-536"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/gtp%e9%85%b6%e6%b4%bb%e5%8c%96%e8%9b%8b%e7%99%bd%ef%bc%88gtpase-activator-proteins-gaps%ef%bc%89%e4%b8%bb%e8%a6%81%e4%bd%9c%e7%94%a8%e6%96%bc%e4%b8%a6%e8%aa%bf%e6%8e%a7ras%e8%9b%8b%e7%99%bd%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">e1ab7f9909daa212b29c4a0374de20c7</guid>
				<title>MedicsKey.A started the discussion GTP酶活化蛋白（GTPase activator proteins, GAPs）主要作用於並調控Ras蛋白。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/gtp%e9%85%b6%e6%b4%bb%e5%8c%96%e8%9b%8b%e7%99%bd%ef%bc%88gtpase-activator-proteins-gaps%ef%bc%89%e4%b8%bb%e8%a6%81%e4%bd%9c%e7%94%a8%e6%96%bc%e4%b8%a6%e8%aa%bf%e6%8e%a7ras%e8%9b%8b%e7%99%bd%e3%80%82/</link>
				<pubDate>Wed, 18 Dec 2024 16:07:26 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/gtp%e9%85%b6%e6%b4%bb%e5%8c%96%e8%9b%8b%e7%99%bd%ef%bc%88gtpase-activator-proteins-gaps%ef%bc%89%e4%b8%bb%e8%a6%81%e4%bd%9c%e7%94%a8%e6%96%bc%e4%b8%a6%e8%aa%bf%e6%8e%a7ras%e8%9b%8b%e7%99%bd%e3%80%82/">GTP酶活化蛋白（GTPase activator proteins, GAPs）主要作用於並調控Ras蛋白。</a></p> <div class="bb-content-inr-wrap"><p>11221-98 生化<br />
98.GTP 酶活化蛋白（GTPase activator proteins, GAPs）最可能直接結合下列何者而調節訊息傳遞？<br />
A.環鳥苷單磷酸（cGMP）<br />
B.Ras 蛋白<br />
C.二醯基甘油（diacylglycerol）<br />
D.腺苷酸環化酶（adenylyl cyclase）</p>
<p>正確答案: B. Ras 蛋白</p>
<p>為何正確: GTP酶活化蛋白（GTPase activator proteins, GAPs）主要通過促進GTP水解來調節Ras蛋白，這是訊息傳遞過程中的關鍵步驟。Ras蛋白作為一種小型GTPase，在細胞的生長和分化中起重要作用，而GAPs則通過促進其GTP水解來調節其活性。</p>
<p>選項: B. Ras 蛋白<br />
詳解:&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-535"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/gtp%e9%85%b6%e6%b4%bb%e5%8c%96%e8%9b%8b%e7%99%bd%ef%bc%88gtpase-activator-proteins-gaps%ef%bc%89%e4%b8%bb%e8%a6%81%e4%bd%9c%e7%94%a8%e6%96%bc%e4%b8%a6%e8%aa%bf%e6%8e%a7ras%e8%9b%8b%e7%99%bd%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">eacbd7be69886d4069bd4fb002b33215</guid>
				<title>MedicsKey.A started the discussion 胰島素(insulin)不會直接結合於G蛋白偶聯受體(GPCR)來進行訊息傳遞。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0insulin%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94gpcr%e4%be%86%e9%80%b2%e8%a1%8c%e8%a8%8a-2/</link>
				<pubDate>Wed, 18 Dec 2024 15:13:18 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0insulin%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94gpcr%e4%be%86%e9%80%b2%e8%a1%8c%e8%a8%8a-2/">胰島素(insulin)不會直接結合於G蛋白偶聯受體(GPCR)來進行訊息傳遞。</a></p> <div class="bb-content-inr-wrap"><p>11221-97 生化<br />
97.下列何種訊息分子通常不會直接結合於G protein-coupled receptor（GPCR）來進行訊息傳遞？<br />
A.angiotensin<br />
B.prostaglandin<br />
C.epinephrine<br />
D.insulin</p>
<p>正確答案: D. insulin</p>
<p>為何正確: 胰島素（insulin）主要結合於受體酪胺酸激酶（receptor tyrosine kinase, RTK）進行訊息傳遞，而非G蛋白偶聯受體（G protein-coupled receptor,&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-534"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0insulin%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94gpcr%e4%be%86%e9%80%b2%e8%a1%8c%e8%a8%8a-2/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">ecd417d52fb1442a682329605e571fc8</guid>
				<title>MedicsKey.A started the discussion 胰島素(insulin)不會直接結合於G蛋白偶聯受體(GPCR)來進行訊息傳遞。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0insulin%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94gpcr%e4%be%86%e9%80%b2%e8%a1%8c%e8%a8%8a/</link>
				<pubDate>Wed, 18 Dec 2024 15:13:18 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0insulin%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94gpcr%e4%be%86%e9%80%b2%e8%a1%8c%e8%a8%8a/">胰島素(insulin)不會直接結合於G蛋白偶聯受體(GPCR)來進行訊息傳遞。</a></p> <div class="bb-content-inr-wrap"><p>11221-97 生化<br />
97.下列何種訊息分子通常不會直接結合於G protein-coupled receptor（GPCR）來進行訊息傳遞？<br />
A.angiotensin<br />
B.prostaglandin<br />
C.epinephrine<br />
D.insulin</p>
<p>正確答案: D. insulin</p>
<p>為何正確: 胰島素（insulin）主要結合於受體酪胺酸激酶（receptor tyrosine kinase, RTK）進行訊息傳遞，而非G蛋白偶聯受體（G protein-coupled receptor,&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-533"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0insulin%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94gpcr%e4%be%86%e9%80%b2%e8%a1%8c%e8%a8%8a/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">aef0c7c7efe8b501e56c0ab40c38149d</guid>
				<title>MedicsKey.A started the discussion 胰島素（insulin）不會直接結合於G蛋白偶聯受體（G protein-coupled receptor, GPCR），而是通過其自身的胰島素受體（insulin receptor），一種受體酪氨酸激酶，來進行訊息傳遞。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0%ef%bc%88insulin%ef%bc%89%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94%ef%bc%88g-protein-coupled-rec/</link>
				<pubDate>Wed, 18 Dec 2024 12:44:19 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0%ef%bc%88insulin%ef%bc%89%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94%ef%bc%88g-protein-coupled-rec/">胰島素（insulin）不會直接結合於G蛋白偶聯受體（G protein-coupled receptor, GPCR），而是通過其自身的胰島素受體（insulin receptor），一種受體酪氨酸激酶，來進行訊息傳遞。</a></p> <div class="bb-content-inr-wrap"><p>11321-97 生化<br />
97.下列何種訊息分子通常不會直接結合於 G protein-coupled receptor（GPCR）來進行訊息傳遞？<br />
A.angiotensin<br />
B.prostaglandin<br />
C.epinephrine<br />
D.insulin</p>
<p>正確答案: D.insulin</p>
<p>為何正確: 胰島素（insulin）是一種激素，其受體屬於酪胺酸激酶受體家族，而非 G 蛋白偶聯受體（G protein-coupled receptor, GPCR）。胰島素受體透過激活內在的酪胺酸激酶活性來傳遞信號，而不是透過 G 蛋白的信號傳遞途徑。因此，胰島素不會直接結合於 GPCR&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-532"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0%ef%bc%88insulin%ef%bc%89%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94%ef%bc%88g-protein-coupled-rec/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">84ef7497eacac5cf8a7bb82b8c1b5862</guid>
				<title>MedicsKey.A started the discussion 胰島素（insulin）不會直接結合於G蛋白偶聯受體（G protein-coupled receptor, GPCR），而是通過其自身的胰島素受體（insulin receptor），一種受體酪氨酸激酶，來進行訊息傳遞。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0%ef%bc%88insulin%ef%bc%89%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94%ef%bc%88g-protein-coupled-rec/</link>
				<pubDate>Wed, 18 Dec 2024 12:44:19 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0%ef%bc%88insulin%ef%bc%89%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94%ef%bc%88g-protein-coupled-rec/">胰島素（insulin）不會直接結合於G蛋白偶聯受體（G protein-coupled receptor, GPCR），而是通過其自身的胰島素受體（insulin receptor），一種受體酪氨酸激酶，來進行訊息傳遞。</a></p> <div class="bb-content-inr-wrap"><p>11321-97 生化<br />
97.下列何種訊息分子通常不會直接結合於 G protein-coupled receptor（GPCR）來進行訊息傳遞？<br />
A.angiotensin<br />
B.prostaglandin<br />
C.epinephrine<br />
D.insulin</p>
<p>正確答案: D.insulin</p>
<p>為何正確: 胰島素（insulin）是一種激素，其受體屬於酪胺酸激酶受體家族，而非 G 蛋白偶聯受體（G protein-coupled receptor, GPCR）。胰島素受體透過激活內在的酪胺酸激酶活性來傳遞信號，而不是透過 G 蛋白的信號傳遞途徑。因此，胰島素不會直接結合於 GPCR&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-531"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%83%b0%e5%b3%b6%e7%b4%a0%ef%bc%88insulin%ef%bc%89%e4%b8%8d%e6%9c%83%e7%9b%b4%e6%8e%a5%e7%b5%90%e5%90%88%e6%96%bcg%e8%9b%8b%e7%99%bd%e5%81%b6%e8%81%af%e5%8f%97%e9%ab%94%ef%bc%88g-protein-coupled-rec/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">cd2a923a281dd8287808c0009fb6bae0</guid>
				<title>MedicsKey.A started the discussion 在真核生物的細胞週期中，cyclin-dependent protein kinase（CDK）的催化活性主要受cyclin、kinase和phosphatase調控，不直接受ubiquitin的調控。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%9a%84%e7%b4%b0%e8%83%9e%e9%80%b1%e6%9c%9f%e4%b8%ad%ef%bc%8ccyclin-dependent-protein-kinase%ef%bc%88cdk%ef%bc%89%e7%9a%84%e5%82%ac%e5%8c%96%e6%b4%bb-2/</link>
				<pubDate>Wed, 18 Dec 2024 12:39:19 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%9a%84%e7%b4%b0%e8%83%9e%e9%80%b1%e6%9c%9f%e4%b8%ad%ef%bc%8ccyclin-dependent-protein-kinase%ef%bc%88cdk%ef%bc%89%e7%9a%84%e5%82%ac%e5%8c%96%e6%b4%bb-2/">在真核生物的細胞週期中，cyclin-dependent protein kinase（CDK）的催化活性主要受cyclin、kinase和phosphatase調控，不直接受ubiquitin的調控。</a></p> <div class="bb-content-inr-wrap"><p>11321-96 生化<br />
96.真核生物的細胞週期中，cyclin-dependent protein kinase（CDK）的催化活性不受下列何種蛋白直接調控？<br />
A.cyclin<br />
B.kinase<br />
C.phosphatase<br />
D.ubiquitin</p>
<p>正確答案: D.ubiquitin</p>
<p>為何正確: cyclin-dependent protein&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-530"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%9a%84%e7%b4%b0%e8%83%9e%e9%80%b1%e6%9c%9f%e4%b8%ad%ef%bc%8ccyclin-dependent-protein-kinase%ef%bc%88cdk%ef%bc%89%e7%9a%84%e5%82%ac%e5%8c%96%e6%b4%bb-2/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">cfc4959153583028315bb63862859bc3</guid>
				<title>MedicsKey.A started the discussion 在真核生物的細胞週期中，cyclin-dependent protein kinase（CDK）的催化活性主要受cyclin、kinase和phosphatase調控，不直接受ubiquitin的調控。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%9a%84%e7%b4%b0%e8%83%9e%e9%80%b1%e6%9c%9f%e4%b8%ad%ef%bc%8ccyclin-dependent-protein-kinase%ef%bc%88cdk%ef%bc%89%e7%9a%84%e5%82%ac%e5%8c%96%e6%b4%bb/</link>
				<pubDate>Wed, 18 Dec 2024 12:39:19 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%9a%84%e7%b4%b0%e8%83%9e%e9%80%b1%e6%9c%9f%e4%b8%ad%ef%bc%8ccyclin-dependent-protein-kinase%ef%bc%88cdk%ef%bc%89%e7%9a%84%e5%82%ac%e5%8c%96%e6%b4%bb/">在真核生物的細胞週期中，cyclin-dependent protein kinase（CDK）的催化活性主要受cyclin、kinase和phosphatase調控，不直接受ubiquitin的調控。</a></p> <div class="bb-content-inr-wrap"><p>11321-96 生化<br />
96.真核生物的細胞週期中，cyclin-dependent protein kinase（CDK）的催化活性不受下列何種蛋白直接調控？<br />
A.cyclin<br />
B.kinase<br />
C.phosphatase<br />
D.ubiquitin</p>
<p>正確答案: D.ubiquitin</p>
<p>為何正確: cyclin-dependent protein&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-529"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%9c%9f%e6%a0%b8%e7%94%9f%e7%89%a9%e7%9a%84%e7%b4%b0%e8%83%9e%e9%80%b1%e6%9c%9f%e4%b8%ad%ef%bc%8ccyclin-dependent-protein-kinase%ef%bc%88cdk%ef%bc%89%e7%9a%84%e5%82%ac%e5%8c%96%e6%b4%bb/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">acba90c51e07ed343ef664fd80236d93</guid>
				<title>MedicsKey.A started the discussion 在粒線體電子傳遞鏈(mitochondrial electron transport chain)中，complex IV（細胞色素C氧化酶, cytochrome c oxidase）負責將氧氣還原成水。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%b2%92%e7%b7%9a%e9%ab%94%e9%9b%bb%e5%ad%90%e5%82%b3%e9%81%9e%e9%8f%88mitochondrial-electron-transport-chain%e4%b8%ad%ef%bc%8ccomplex-iv%ef%bc%88%e7%b4%b0%e8%83%9e%e8%89%b2%e7%b4%a0c-2/</link>
				<pubDate>Wed, 18 Dec 2024 12:36:20 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%b2%92%e7%b7%9a%e9%ab%94%e9%9b%bb%e5%ad%90%e5%82%b3%e9%81%9e%e9%8f%88mitochondrial-electron-transport-chain%e4%b8%ad%ef%bc%8ccomplex-iv%ef%bc%88%e7%b4%b0%e8%83%9e%e8%89%b2%e7%b4%a0c-2/">在粒線體電子傳遞鏈(mitochondrial electron transport chain)中，complex IV（細胞色素C氧化酶, cytochrome c oxidase）負責將氧氣還原成水。</a></p> <div class="bb-content-inr-wrap"><p>11321-95 生化<br />
95.下列粒線體電子傳遞鏈中的那個酵素複合體（complex）可以將氧氣還原成水？<br />
A.complex I<br />
B.complex II<br />
C.complex III<br />
D.complex IV</p>
<p>正確答案: D.complex IV</p>
<p>為何正確: 在粒線體電子傳遞鏈中，complex IV，也稱為細胞色素氧化酶(cytochrome oxidase)，是負責將氧氣還原成水的酵素複合體。這個過程是電子傳遞鏈的最終步驟，氧氣在這裡接受電子並結合氫離子形成水。</p>
<p>選項: D. complex IV</p>
<p>詳解: 在粒線體電子傳遞鏈（mitochondrial electron&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-528"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%b2%92%e7%b7%9a%e9%ab%94%e9%9b%bb%e5%ad%90%e5%82%b3%e9%81%9e%e9%8f%88mitochondrial-electron-transport-chain%e4%b8%ad%ef%bc%8ccomplex-iv%ef%bc%88%e7%b4%b0%e8%83%9e%e8%89%b2%e7%b4%a0c-2/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">2405e30a62c80afbbedcb38df0b53eb7</guid>
				<title>MedicsKey.A started the discussion 在粒線體電子傳遞鏈(mitochondrial electron transport chain)中，complex IV（細胞色素C氧化酶, cytochrome c oxidase）負責將氧氣還原成水。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%b2%92%e7%b7%9a%e9%ab%94%e9%9b%bb%e5%ad%90%e5%82%b3%e9%81%9e%e9%8f%88mitochondrial-electron-transport-chain%e4%b8%ad%ef%bc%8ccomplex-iv%ef%bc%88%e7%b4%b0%e8%83%9e%e8%89%b2%e7%b4%a0c/</link>
				<pubDate>Wed, 18 Dec 2024 12:36:20 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%b2%92%e7%b7%9a%e9%ab%94%e9%9b%bb%e5%ad%90%e5%82%b3%e9%81%9e%e9%8f%88mitochondrial-electron-transport-chain%e4%b8%ad%ef%bc%8ccomplex-iv%ef%bc%88%e7%b4%b0%e8%83%9e%e8%89%b2%e7%b4%a0c/">在粒線體電子傳遞鏈(mitochondrial electron transport chain)中，complex IV（細胞色素C氧化酶, cytochrome c oxidase）負責將氧氣還原成水。</a></p> <div class="bb-content-inr-wrap"><p>11321-95 生化<br />
95.下列粒線體電子傳遞鏈中的那個酵素複合體（complex）可以將氧氣還原成水？<br />
A.complex I<br />
B.complex II<br />
C.complex III<br />
D.complex IV</p>
<p>正確答案: D.complex IV</p>
<p>為何正確: 在粒線體電子傳遞鏈中，complex IV，也稱為細胞色素氧化酶(cytochrome oxidase)，是負責將氧氣還原成水的酵素複合體。這個過程是電子傳遞鏈的最終步驟，氧氣在這裡接受電子並結合氫離子形成水。</p>
<p>選項: D. complex IV</p>
<p>詳解: 在粒線體電子傳遞鏈（mitochondrial electron&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-527"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%9c%a8%e7%b2%92%e7%b7%9a%e9%ab%94%e9%9b%bb%e5%ad%90%e5%82%b3%e9%81%9e%e9%8f%88mitochondrial-electron-transport-chain%e4%b8%ad%ef%bc%8ccomplex-iv%ef%bc%88%e7%b4%b0%e8%83%9e%e8%89%b2%e7%b4%a0c/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">54df0b3019b69e6f40a3a90999c686b7</guid>
				<title>MedicsKey.A started the discussion 天門冬醯胺（asparagine）屬於生糖性胺基酸（glucogenic amino acid）。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%a4%a9%e9%96%80%e5%86%ac%e9%86%af%e8%83%ba%ef%bc%88asparagine%ef%bc%89%e5%b1%ac%e6%96%bc%e7%94%9f%e7%b3%96%e6%80%a7%e8%83%ba%e5%9f%ba%e9%85%b8%ef%bc%88glucogenic-amino-acid%ef%bc%89%e3%80%82-2/</link>
				<pubDate>Wed, 18 Dec 2024 12:33:21 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%a4%a9%e9%96%80%e5%86%ac%e9%86%af%e8%83%ba%ef%bc%88asparagine%ef%bc%89%e5%b1%ac%e6%96%bc%e7%94%9f%e7%b3%96%e6%80%a7%e8%83%ba%e5%9f%ba%e9%85%b8%ef%bc%88glucogenic-amino-acid%ef%bc%89%e3%80%82-2/">天門冬醯胺（asparagine）屬於生糖性胺基酸（glucogenic amino acid）。</a></p> <div class="bb-content-inr-wrap"><p>11321-94 生化<br />
94.有關天門冬醯胺（asparagine）的敘述，下列何者錯誤？<br />
A.為非必需胺基酸（nonessential amino acid）<br />
B.可代謝成為天門冬胺酸（aspartate）<br />
C.屬於生酮性胺基酸（ketogenic amino acid）<br />
D.天門冬醯胺酶（asparaginase）能分解血液中的 asparagine</p>
<p>正確答案: C.屬於生酮性胺基酸（ketogenic amino acid）</p>
<p>為何正確: 天門冬醯胺（asparagine）是屬於非必需胺基酸（nonessential amino&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-526"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%a4%a9%e9%96%80%e5%86%ac%e9%86%af%e8%83%ba%ef%bc%88asparagine%ef%bc%89%e5%b1%ac%e6%96%bc%e7%94%9f%e7%b3%96%e6%80%a7%e8%83%ba%e5%9f%ba%e9%85%b8%ef%bc%88glucogenic-amino-acid%ef%bc%89%e3%80%82-2/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">a36e174c2949da236cb197746ca6de04</guid>
				<title>MedicsKey.A started the discussion 天門冬醯胺（asparagine）屬於生糖性胺基酸（glucogenic amino acid）。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%a4%a9%e9%96%80%e5%86%ac%e9%86%af%e8%83%ba%ef%bc%88asparagine%ef%bc%89%e5%b1%ac%e6%96%bc%e7%94%9f%e7%b3%96%e6%80%a7%e8%83%ba%e5%9f%ba%e9%85%b8%ef%bc%88glucogenic-amino-acid%ef%bc%89%e3%80%82/</link>
				<pubDate>Wed, 18 Dec 2024 12:33:21 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%a4%a9%e9%96%80%e5%86%ac%e9%86%af%e8%83%ba%ef%bc%88asparagine%ef%bc%89%e5%b1%ac%e6%96%bc%e7%94%9f%e7%b3%96%e6%80%a7%e8%83%ba%e5%9f%ba%e9%85%b8%ef%bc%88glucogenic-amino-acid%ef%bc%89%e3%80%82/">天門冬醯胺（asparagine）屬於生糖性胺基酸（glucogenic amino acid）。</a></p> <div class="bb-content-inr-wrap"><p>11321-94 生化<br />
94.有關天門冬醯胺（asparagine）的敘述，下列何者錯誤？<br />
A.為非必需胺基酸（nonessential amino acid）<br />
B.可代謝成為天門冬胺酸（aspartate）<br />
C.屬於生酮性胺基酸（ketogenic amino acid）<br />
D.天門冬醯胺酶（asparaginase）能分解血液中的 asparagine</p>
<p>正確答案: C.屬於生酮性胺基酸（ketogenic amino acid）</p>
<p>為何正確: 天門冬醯胺（asparagine）是屬於非必需胺基酸（nonessential amino&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-525"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e5%a4%a9%e9%96%80%e5%86%ac%e9%86%af%e8%83%ba%ef%bc%88asparagine%ef%bc%89%e5%b1%ac%e6%96%bc%e7%94%9f%e7%b3%96%e6%80%a7%e8%83%ba%e5%9f%ba%e9%85%b8%ef%bc%88glucogenic-amino-acid%ef%bc%89%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">c5d4eb28c7b81e61e0c640f90d54935b</guid>
				<title>MedicsKey.A started the discussion 色胺酸（tryptophan）不是多巴胺（dopamine）的前驅物。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%89%b2%e8%83%ba%e9%85%b8%ef%bc%88tryptophan%ef%bc%89%e4%b8%8d%e6%98%af%e5%a4%9a%e5%b7%b4%e8%83%ba%ef%bc%88dopamine%ef%bc%89%e7%9a%84%e5%89%8d%e9%a9%85%e7%89%a9%e3%80%82-2/</link>
				<pubDate>Wed, 18 Dec 2024 12:23:18 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%89%b2%e8%83%ba%e9%85%b8%ef%bc%88tryptophan%ef%bc%89%e4%b8%8d%e6%98%af%e5%a4%9a%e5%b7%b4%e8%83%ba%ef%bc%88dopamine%ef%bc%89%e7%9a%84%e5%89%8d%e9%a9%85%e7%89%a9%e3%80%82-2/">色胺酸（tryptophan）不是多巴胺（dopamine）的前驅物。</a></p> <div class="bb-content-inr-wrap"><p>11321-93 生化<br />
93.下列有關色胺酸（tryptophan）之敘述，何者錯誤？<br />
A.為人體必需胺基酸<br />
B.色胺酸羥化酶（tryptophan hydroxylase）受抑制易導致憂鬱症<br />
C.為合成血清素（serotonin）的前驅物<br />
D.可代謝形成多巴胺（dopamine）</p>
<p>正確答案: D.可代謝形成多巴胺（dopamine）</p>
<p>為何正確: 色胺酸（tryptophan）是人體必需胺基酸，也是合成血清素（serotonin）的前驅物。色胺酸羥化酶（tryptophan&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-524"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%89%b2%e8%83%ba%e9%85%b8%ef%bc%88tryptophan%ef%bc%89%e4%b8%8d%e6%98%af%e5%a4%9a%e5%b7%b4%e8%83%ba%ef%bc%88dopamine%ef%bc%89%e7%9a%84%e5%89%8d%e9%a9%85%e7%89%a9%e3%80%82-2/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">50336082a4e62bf4be26481f6834965b</guid>
				<title>MedicsKey.A started the discussion 色胺酸（tryptophan）不是多巴胺（dopamine）的前驅物。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%89%b2%e8%83%ba%e9%85%b8%ef%bc%88tryptophan%ef%bc%89%e4%b8%8d%e6%98%af%e5%a4%9a%e5%b7%b4%e8%83%ba%ef%bc%88dopamine%ef%bc%89%e7%9a%84%e5%89%8d%e9%a9%85%e7%89%a9%e3%80%82/</link>
				<pubDate>Wed, 18 Dec 2024 12:23:17 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%89%b2%e8%83%ba%e9%85%b8%ef%bc%88tryptophan%ef%bc%89%e4%b8%8d%e6%98%af%e5%a4%9a%e5%b7%b4%e8%83%ba%ef%bc%88dopamine%ef%bc%89%e7%9a%84%e5%89%8d%e9%a9%85%e7%89%a9%e3%80%82/">色胺酸（tryptophan）不是多巴胺（dopamine）的前驅物。</a></p> <div class="bb-content-inr-wrap"><p>11321-93 生化<br />
93.下列有關色胺酸（tryptophan）之敘述，何者錯誤？<br />
A.為人體必需胺基酸<br />
B.色胺酸羥化酶（tryptophan hydroxylase）受抑制易導致憂鬱症<br />
C.為合成血清素（serotonin）的前驅物<br />
D.可代謝形成多巴胺（dopamine）</p>
<p>正確答案: D.可代謝形成多巴胺（dopamine）</p>
<p>為何正確: 色胺酸（tryptophan）是人體必需胺基酸，也是合成血清素（serotonin）的前驅物。色胺酸羥化酶（tryptophan&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-523"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%89%b2%e8%83%ba%e9%85%b8%ef%bc%88tryptophan%ef%bc%89%e4%b8%8d%e6%98%af%e5%a4%9a%e5%b7%b4%e8%83%ba%ef%bc%88dopamine%ef%bc%89%e7%9a%84%e5%89%8d%e9%a9%85%e7%89%a9%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">d03c8b3a28e416d57a69db3e589fe9fe</guid>
				<title>MedicsKey.A started the discussion 膜周邊蛋白（peripheral membrane proteins）不具有穿透膜的結構。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%86%9c%e5%91%a8%e9%82%8a%e8%9b%8b%e7%99%bd%ef%bc%88peripheral-membrane-proteins%ef%bc%89%e4%b8%8d%e5%85%b7%e6%9c%89%e7%a9%bf%e9%80%8f%e8%86%9c%e7%9a%84%e7%b5%90%e6%a7%8b%e3%80%82/</link>
				<pubDate>Wed, 18 Dec 2024 12:21:19 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%86%9c%e5%91%a8%e9%82%8a%e8%9b%8b%e7%99%bd%ef%bc%88peripheral-membrane-proteins%ef%bc%89%e4%b8%8d%e5%85%b7%e6%9c%89%e7%a9%bf%e9%80%8f%e8%86%9c%e7%9a%84%e7%b5%90%e6%a7%8b%e3%80%82/">膜周邊蛋白（peripheral membrane proteins）不具有穿透膜的結構。</a></p> <div class="bb-content-inr-wrap"><p>11321-92 生化<br />
92.下列有關膜周邊蛋白（peripheral membrane proteins）的描述，何者錯誤？<br />
A.調整溶液的 pH 值與離子強度可以將它和細胞膜分離<br />
B.具有穿透膜結構<br />
C.可以利用離子鍵和其他細胞膜蛋白穩定結合<br />
D.可以利用氫鍵和其他細胞膜蛋白穩定結合</p>
<p>正確答案: B.具有穿透膜結構</p>
<p>為何正確: 膜周邊蛋白（peripheral membrane proteins）是附著在細胞膜表面的蛋白質，與細胞膜的結合主要是通過非共價鍵，如離子鍵和氫鍵，而不是穿透膜的結構。穿透膜的結構是膜內在蛋白（integral membrane proteins）的特徵。因此，選項B的描述不符合膜周邊蛋白的特性。</p>
<p>選項: B<br />
詳解:&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-522"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e8%86%9c%e5%91%a8%e9%82%8a%e8%9b%8b%e7%99%bd%ef%bc%88peripheral-membrane-proteins%ef%bc%89%e4%b8%8d%e5%85%b7%e6%9c%89%e7%a9%bf%e9%80%8f%e8%86%9c%e7%9a%84%e7%b5%90%e6%a7%8b%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">24a899a10482ea6bf1418c07981a660c</guid>
				<title>MedicsKey.A started the discussion 維生素 K 是異戊二烯類(isoprenoid)的衍生物。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b6%ad%e7%94%9f%e7%b4%a0-k-%e6%98%af%e7%95%b0%e6%88%8a%e4%ba%8c%e7%83%af%e9%a1%9eisoprenoid%e7%9a%84%e8%a1%8d%e7%94%9f%e7%89%a9%e3%80%82-2/</link>
				<pubDate>Wed, 18 Dec 2024 12:18:25 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b6%ad%e7%94%9f%e7%b4%a0-k-%e6%98%af%e7%95%b0%e6%88%8a%e4%ba%8c%e7%83%af%e9%a1%9eisoprenoid%e7%9a%84%e8%a1%8d%e7%94%9f%e7%89%a9%e3%80%82-2/">維生素 K 是異戊二烯類(isoprenoid)的衍生物。</a></p> <div class="bb-content-inr-wrap"><p>11321-91 生化<br />
91.參與凝血作用的維生素 K 是下列何者的衍生物？<br />
A.7-dehydrocholesterol<br />
B.arachidonate<br />
C.isoprenoid<br />
D.pregnenolone</p>
<p>正確答案: C.isoprenoid</p>
<p>為何正確: 維生素 K 是一組脂溶性維生素，主要參與血液凝固過程，其生物合成路徑含有異戊二烯衍生物（isoprenoid）。維生素 K 的結構中包含多個異戊二烯單元，這些單元是其天然衍生物的基礎。因此，isoprenoid 是正確的選項。</p>
<p>選項: A<br />
詳解: 7-dehydrocholesterol 是維生素 D3 的前體，而非維生素 K 的衍生物。因此，這個選項與凝血作用的維生素 K 無關。</p>
<p>選項: B<br />
詳解:&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-521"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b6%ad%e7%94%9f%e7%b4%a0-k-%e6%98%af%e7%95%b0%e6%88%8a%e4%ba%8c%e7%83%af%e9%a1%9eisoprenoid%e7%9a%84%e8%a1%8d%e7%94%9f%e7%89%a9%e3%80%82-2/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">e9caeebfbc7df4c97f75b747642d91a3</guid>
				<title>MedicsKey.A started the discussion 維生素 K 是異戊二烯類(isoprenoid)的衍生物。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b6%ad%e7%94%9f%e7%b4%a0-k-%e6%98%af%e7%95%b0%e6%88%8a%e4%ba%8c%e7%83%af%e9%a1%9eisoprenoid%e7%9a%84%e8%a1%8d%e7%94%9f%e7%89%a9%e3%80%82/</link>
				<pubDate>Wed, 18 Dec 2024 12:18:25 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b6%ad%e7%94%9f%e7%b4%a0-k-%e6%98%af%e7%95%b0%e6%88%8a%e4%ba%8c%e7%83%af%e9%a1%9eisoprenoid%e7%9a%84%e8%a1%8d%e7%94%9f%e7%89%a9%e3%80%82/">維生素 K 是異戊二烯類(isoprenoid)的衍生物。</a></p> <div class="bb-content-inr-wrap"><p>11321-91 生化<br />
91.參與凝血作用的維生素 K 是下列何者的衍生物？<br />
A.7-dehydrocholesterol<br />
B.arachidonate<br />
C.isoprenoid<br />
D.pregnenolone</p>
<p>正確答案: C.isoprenoid</p>
<p>為何正確: 維生素 K 是一組脂溶性維生素，主要參與血液凝固過程，其生物合成路徑含有異戊二烯衍生物（isoprenoid）。維生素 K 的結構中包含多個異戊二烯單元，這些單元是其天然衍生物的基礎。因此，isoprenoid 是正確的選項。</p>
<p>選項: A<br />
詳解: 7-dehydrocholesterol 是維生素 D3 的前體，而非維生素 K 的衍生物。因此，這個選項與凝血作用的維生素 K 無關。</p>
<p>選項: B<br />
詳解:&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-520"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%b6%ad%e7%94%9f%e7%b4%a0-k-%e6%98%af%e7%95%b0%e6%88%8a%e4%ba%8c%e7%83%af%e9%a1%9eisoprenoid%e7%9a%84%e8%a1%8d%e7%94%9f%e7%89%a9%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">443084b9db72ff3b521cd0a858be7062</guid>
				<title>MedicsKey.A started the discussion Acetyl-CoA carboxylase 的活性最不受輔酶A（coenzyme A）調控。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/acetyl-coa-carboxylase-%e7%9a%84%e6%b4%bb%e6%80%a7%e6%9c%80%e4%b8%8d%e5%8f%97%e8%bc%94%e9%85%b6a%ef%bc%88coenzyme-a%ef%bc%89%e8%aa%bf%e6%8e%a7%e3%80%82/</link>
				<pubDate>Wed, 18 Dec 2024 12:09:29 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/acetyl-coa-carboxylase-%e7%9a%84%e6%b4%bb%e6%80%a7%e6%9c%80%e4%b8%8d%e5%8f%97%e8%bc%94%e9%85%b6a%ef%bc%88coenzyme-a%ef%bc%89%e8%aa%bf%e6%8e%a7%e3%80%82/">Acetyl-CoA carboxylase 的活性最不受輔酶A（coenzyme A）調控。</a></p> <div class="bb-content-inr-wrap"><p>11321-90 生化<br />
90.Acetyl-CoA carboxylase 為脂肪酸生合成的第一個酵素，其活性最不受下列何者調控？<br />
A.胰島素（insulin）<br />
B.輔酶 A（coenzyme A）<br />
C.檸檬酸（citrate）<br />
D.AMP-activated protein kinase（AMPK）</p>
<p>正確答案: B.輔酶 A（coenzyme A）</p>
<p>為何正確: Acetyl-CoA carboxylase是脂肪酸生合成的關鍵酵素，其活性受到多種因素的調控，包括胰島素（insulin）和檸檬酸（citrate）等代謝物質的影響，而AMP-activated protein&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-519"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/acetyl-coa-carboxylase-%e7%9a%84%e6%b4%bb%e6%80%a7%e6%9c%80%e4%b8%8d%e5%8f%97%e8%bc%94%e9%85%b6a%ef%bc%88coenzyme-a%ef%bc%89%e8%aa%bf%e6%8e%a7%e3%80%82/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">bd1690fb1ba6cee840c96ab5514e2769</guid>
				<title>MedicsKey.A started the discussion Acetyl-CoA carboxylase 的活性最不受輔酶A（coenzyme A）調控。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/acetyl-coa-carboxylase-%e7%9a%84%e6%b4%bb%e6%80%a7%e6%9c%80%e4%b8%8d%e5%8f%97%e8%bc%94%e9%85%b6a%ef%bc%88coenzyme-a%ef%bc%89%e8%aa%bf%e6%8e%a7%e3%80%82-2/</link>
				<pubDate>Wed, 18 Dec 2024 12:09:29 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/acetyl-coa-carboxylase-%e7%9a%84%e6%b4%bb%e6%80%a7%e6%9c%80%e4%b8%8d%e5%8f%97%e8%bc%94%e9%85%b6a%ef%bc%88coenzyme-a%ef%bc%89%e8%aa%bf%e6%8e%a7%e3%80%82-2/">Acetyl-CoA carboxylase 的活性最不受輔酶A（coenzyme A）調控。</a></p> <div class="bb-content-inr-wrap"><p>11321-90 生化<br />
90.Acetyl-CoA carboxylase 為脂肪酸生合成的第一個酵素，其活性最不受下列何者調控？<br />
A.胰島素（insulin）<br />
B.輔酶 A（coenzyme A）<br />
C.檸檬酸（citrate）<br />
D.AMP-activated protein kinase（AMPK）</p>
<p>正確答案: B.輔酶 A（coenzyme A）</p>
<p>為何正確: Acetyl-CoA carboxylase是脂肪酸生合成的關鍵酵素，其活性受到多種因素的調控，包括胰島素（insulin）和檸檬酸（citrate）等代謝物質的影響，而AMP-activated protein&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-518"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/acetyl-coa-carboxylase-%e7%9a%84%e6%b4%bb%e6%80%a7%e6%9c%80%e4%b8%8d%e5%8f%97%e8%bc%94%e9%85%b6a%ef%bc%88coenzyme-a%ef%bc%89%e8%aa%bf%e6%8e%a7%e3%80%82-2/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
					<item>
				<guid isPermaLink="false">0529c73759e0c7052131a5cfa6b15937</guid>
				<title>MedicsKey.A started the discussion 烯醇化酶（enolase）不是糖解作用（glycolysis）中速率的主要調控者。 in the forum 生物化學</title>
				<link>https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%83%af%e9%86%87%e5%8c%96%e9%85%b6%ef%bc%88enolase%ef%bc%89%e4%b8%8d%e6%98%af%e7%b3%96%e8%a7%a3%e4%bd%9c%e7%94%a8%ef%bc%88glycolysis%ef%bc%89%e4%b8%ad%e9%80%9f%e7%8e%87%e7%9a%84%e4%b8%bb%e8%a6%81/</link>
				<pubDate>Wed, 18 Dec 2024 11:59:19 +0800</pubDate>

									<content:encoded><![CDATA[<p class = "activity-discussion-title-wrap"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%83%af%e9%86%87%e5%8c%96%e9%85%b6%ef%bc%88enolase%ef%bc%89%e4%b8%8d%e6%98%af%e7%b3%96%e8%a7%a3%e4%bd%9c%e7%94%a8%ef%bc%88glycolysis%ef%bc%89%e4%b8%ad%e9%80%9f%e7%8e%87%e7%9a%84%e4%b8%bb%e8%a6%81/">烯醇化酶（enolase）不是糖解作用（glycolysis）中速率的主要調控者。</a></p> <div class="bb-content-inr-wrap"><p>11321-89 生化<br />
89.下列那種酵素的活性並非調節糖解作用（glycolysis）速率的主要調控者？<br />
A.己糖激酶（hexokinase）<br />
B.磷酸果糖激酶（phosphofructokinase）<br />
C.烯醇化酶（enolase）<br />
D.丙酮酸激酶（pyruvate kinase）</p>
<p>正確答案: C. 烯醇化酶（enolase）</p>
<p>為何正確: 糖解作用（glycolysis）中的主要調控酵素是那些能夠影響整體反應速率的關鍵步驟酵素，這包括己糖激酶（hexokinase）、磷酸果糖激酶（phosphofructokinase）和丙酮酸激酶（pyruvate&hellip;</p>
<p><span class="activity-read-more" id="activity-read-more-517"><a href="https://medicskey.com/groups/%e7%94%9f%e7%89%a9%e5%8c%96%e5%ad%b8/forum/discussion/%e7%83%af%e9%86%87%e5%8c%96%e9%85%b6%ef%bc%88enolase%ef%bc%89%e4%b8%8d%e6%98%af%e7%b3%96%e8%a7%a3%e4%bd%9c%e7%94%a8%ef%bc%88glycolysis%ef%bc%89%e4%b8%ad%e9%80%9f%e7%8e%87%e7%9a%84%e4%b8%bb%e8%a6%81/" rel="nofollow"> Read more</a></span></p>
</div>]]></content:encoded>
				
				
							</item>
		
	</channel>
</rss>
		