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 respiration which processq*4oqg 3g xv6r (b1m4 3*f( ngngolmhd does notq omyl;quav3k 1a,8a. involve the conversion of ADP to ATP?
A. Reformation of oxaloacetate from a 5-carbon compound in the Krebs cycle
B. Decarboxylation of pyruvate to acetyl-CoA in the link reaction
C. Glycolysis
D. Rotation of ATP synthase
参考答案: B
本题详细解析:
ADP combines with inorganic phosphate to form ATP.4mpv+om: ,epq-a3z2rs cful, which is the usable form of energy. This conversion takes place during three stages of cellular respiration; glycolysis, Krebs cycle and oxidative phosphorylation.
In glycolysis, glucose is converted into two pyruvate molecules (Choice C). This involves a net production of 2 molecules of ATP.
The next stage after glycolysis is the link reaction (Choice B). Here the decarboxylation of pyruvate happens, producing acetyl-CoA and reduced NADH.poeprmq, c2zsfm-u . avl3+ :4 This reaction does not involve any conversion of ADP to ATP.
In part of the Krebs cycle, a 5-carbon compound is decarboxylated and, through a series of reactions, the 4-carbon compound oxaloacetate is reformed (Choice A). This involves the production of 1 molecule of ATP.
On the cristae of mitochondria, ATP synthase rotates (Choice D) as protons diffuse from the intermembrane space to the matrix of the mitochondria (or from the thylakoids to the stroma in chloroplasts) and converts ADP to ATP.
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