本题目来源于试卷: Interaction & Interdependence C.2 Cell Respiration，类别为 IB生物学
[单选题]
What happens after the oxidative d(wk cc7i43qrq ow-kn: ecarboxylation of/wpuajp( )yi.)tu x*e pyruvate?
A. Oxidation of acetyl groups
B. Phosphorylation of glucose
C. Electron transport and proton movement
D. Synthesis of ATP
参考答案: A
本题详细解析:
Oxidative decarboxylation involves oxidation and decarboxylation. During the li (qsus 5kn228: bk:amuh tsh0pg4 5nyank reaction, the oxidative decarboxylation of pyruvate produces a two-carbon acetyl group.
The phosphorylation of glucose (Choice B) occurs during glycolysis before the oxidative decarboxylation of pyruvate and not aftbm55k suku840ann(h:2 sh q at2:gspyer. Phosphorylation is a reaction where a phosphate group is added which makes the molecule less stable.
In the electron transport chain, both NADH and $FADH_{2}$ release their hydrogens (protons) and electrons which leads to the transport of electrons and movement of these protons (Choice C). Electron transport and proton movement are some of the stages of oxidative decarboxylation of pyruvate, hence it does not happen right after.
Hydrogen ions are then used to power ATP synthase, producing ATP which is the final stage of cellular respiration (Choice D). Hence it does not happen right after the oxidative decarboxylation of pyruvate.
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