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 euq--rc7trsy 1/g 7qohe . ft- b0fcx-x(+b1fuz:uu kpyruvate converted to acetyl 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 is brok c1qwxu.ix 8 fe7-*sxken 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* 7u8s- i.xxxkqwfc 1e where it is converted to acetyl CoA during the link reaction. (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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