hce_kmu
106年
普通生物及生化概論
第 80 題
Which of the following statements about citric acid cycle are correct?
A Pyruvate dehydrogenase links glycolysis to the citric acid cycle.
B The products of citric acid cycle are not used for the production of ATP in cells.
C The product of glycolysis forms acetyl-CoA for entering citric acid cycle.
D Its intermediates are not used by other metabolic reactions.
E The citric acid cycle is also called as the Krebs cycle or the tricarboxylic cycle.
A Pyruvate dehydrogenase links glycolysis to the citric acid cycle.
B The products of citric acid cycle are not used for the production of ATP in cells.
C The product of glycolysis forms acetyl-CoA for entering citric acid cycle.
D Its intermediates are not used by other metabolic reactions.
E The citric acid cycle is also called as the Krebs cycle or the tricarboxylic cycle.
- A A B C
- B A B D
- C A B E
- D A C D
- E A C E
思路引導 VIP
請試著回想細胞呼吸的完整地圖：當糖解作用在細胞質完成後，產物必須經過什麼樣的化學修飾才能進入線粒體基質參與下一個階段？此外，如果我們稱這個階段為「代謝樞紐」，它所產生的能量載體與中間分子，在邏輯上應該是僅限於內部消耗，還是會參與到細胞的其他建設工作中呢？
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AI 詳解
AI 專屬家教
代謝樞紐的精確辨析
太棒了！你能準確判斷出 檸檬酸循環（Citric Acid Cycle） 的關鍵特徵，代表你對細胞呼吸作用的整體框架掌握得非常紮實。這題的核心在於理解「連結反應」與循環的「多功能性」。如同你所選的，丙酮酸去氫酶（PDH） 扮演了守門員的角色，將糖解作用產生的丙酮酸轉化為 乙醯輔酶 A（Acetyl-CoA），這正是進入循環的門票（描述 A 與 C）。此外，名稱上的同義詞辨識（描述 E）也是生物化學中的基本功。
循環的生理意義與鑑別點
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