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 following processes involve decarboxmw5v(gni z( w(ylati+0q+sdv; zlm2 u;sawzon?
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 reactionvsq2:/ chc:,usf +jw5 z(skep 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 (Option II).
The other decarboxylation reactions happen in the Krebs cycle. The acetyl CoA which is produced in the link reaction thenvsc q2s (eu:p/kzw:j,s +5fhc 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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