40. Which statement regarding redox reactions is TRUE? A) NADH and FADH2 are maj

Question

40. Which statement regarding redox reactions is TRUE?
A) NADH and FADH2 are major electron acceptors in the oxidation of fuel molecules.
B) In glycolysis, the conversion of 2-phosphpoglycerate to phosphoenolpyruvate is a redox reaction.
C) In a redox reaction, the oxidation state of the substrate remains unchanged. D) A redox reaction is spontaneous when the substrate has a greater reduction potential than the product.
E) The Nerst equation relates the standard reduction potential of a redox pair to its actual reduction potential at any concentration of either the oxidized or reduced form of the species.

42. Oxaloacetate uniformly labeled with 14C (i.e., with equal amounts of 14C in each of its carbon atoms) is condensed with unlabeled acetyl-CoA. After a single pass through the citric acid cycle back to oxaloacetate, what fraction of the original radioactivity will be found in the oxaloacetate?
A) All
B) 1/2
C) 1/3
D) 1/4
E) 3/4

43. Which drug lipid based?

A) prednisone

B) warfarin

C) erythromycin

D) aspirin

E) lovastatin

44. Cytochrome c can be reduced directly by small molecules such as ascorbate (vitamin C). If ascorbate is added to an oxygenated solution containing purified cytochrome c and cytochrome oxidase, what would you predict would occur?
A) ATP synthesis would occur.
B) Cytochrome c would become reduced and remain reduced.
C) Oxygen would be reduced to water.
D) Ascorbate would become more reduced.
E) No apparent change would be observed.

Explanation / Answer

40. Which statement regarding redox reactions is TRUE? A) NADH and FADH2 are maj

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