本题目来源于试卷: Interaction & Interdependence C.2 Cell Respiration，类别为 IB生物学
[单选题]
In which process is pyruvate converted5p i,,yv. 8jr ob;txcu to aces -zu1sizb ,x5tyl CoA?
A. Glycolysis
B. Link reaction
C. Krebs cycle
D. Oxidative phosphorylation
参考答案: B
本题详细解析:
In glycolysis (Choice A), glucose i4)lgp d. l-4xbu2v u-qf-bpyd5 ts1 ops broken down into pyruvate and this happens in the cytoplasm. Glycolysis is incorrect because pyruvate is only produced at the end of glycolysis and is not converted to acetyl CoA.
Pyruvate produced during glycolysis enters the mitochondria where it is converted to acetyl CoA during the link reacti1p4xtv )q-. spu fol5bypud- g- bl2d4on. (Choice B)
The Link reaction (Choice B) is the reaction that bridges glycolysis with the next stage which is the Krebs cycle (Choice C). Hence, the Krebs cycle is incorrect because acetyl CoA is the reactant and needs to be produced prior to entering the Krebs cycle.
The stage after the Krebs cycle is known as oxidative phosphorylation (Choice D) which involves the synthesis of ATP.
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