本题目来源于试卷: Interaction & Interdependence C.2 Cell Respiration，类别为 IB生物学
[单选题]
Which of the followinm t q b7w3pe2szus25:gg processes involve ded f+vgn 5in5uhgu* n*4carboxylation?
I.Phosphorylation of glucose
II.Oxidation of pyruvate to form acetyl CoA
III. Oxidation of an acetate group to reform the four-carbon oxaloacetate
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
参考答案: C
本题详细解析:
Decarboxylation is a reaction 5guertkc:d ng60rn ;-where carbon dioxide is lost. There are a total of three decarboxylation reactions in the stages of aerobic cellular respiration. One of the decarboxylations happens in the link reaction where pyruvate gets oxidised to acetyl CoA (u 0kctn rg-:n rg5;e6dOption II).
The other decarboxylation reactions happen in the Krebs cycle. The acetyl CoA which is produced in the link reaction then gets oxidised and the 4 carbon oxaloacetate is reformed (Option III). Here, carbon dioxide is removed again.
Phosphorylation of glucose (Option I) takes place before the link reaction, where glucose is converted to pyruvate. Here, no carbon dioxide is removed so it is incorrect.
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