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 cg m99;m;y lsuwiu4 qea;h:tl4onve 03pwru rin(hn opw as5);mj)*rted 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 broken down into pyruvate;auxs7 k1wt,x3v vsaw qwt54/w4xvv2 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 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 Kr1/47 xst;wv2a,vwsv wtwuk xx3q5va 4ebs cycle is known as oxidative phosphorylation (Choice D) which involves the synthesis of ATP.
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