When the $\Delta$G'° of the ATP synthesis reaction is measured on the surface of the ATP synthase enzyme, it is found to be close to zero. This is thought to be due to:
A) a very low energy of activation.
B) enzyme-induced oxygen exchange.
C) stabilization of ADP relative to ATP by enzyme binding.
D) stabilization of ATP relative to ADP by enzyme binding.
E) None of the answers is correct.

Question

Quizplus · Accepted Answer

The close to zero F1F1F1S1F1F1F10G'° measurement indicates that there is no free energy difference between ADP and ATP on the surface of the ATP synthase enzyme. This suggests that the enzyme binds and stabilizes ATP relative to ADP, which makes D the correct answer. A low energy of activation (choice A) would not affect the free energy difference between ADP and ATP. Enzyme-induced oxygen exchange (B) is not relevant to ATP synthesis. Choice E is incorrect because one answer is correct.

When The Δ\DeltaΔ G'° of the ATP Synthesis Reaction Is Measured on the Measured

When The $\Delta$ G'° of the ATP Synthesis Reaction Is Measured on the Measured