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 process doeo4 qrwp v he)wl2h-/a(s not if 5q b..2fg cfxfhbtruo 4.l;1nvolve 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 phosphatew/ohppcg63 xd-),uezl k; 9xj to form ATP, 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. 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 fromc9;/p, dul xk)pjz6howge- x 3 the intermembrane space to the matrix of the mitochondria (or from the thylakoids to the stroma in chloroplasts) and converts ADP to ATP.
| 
