For the half-reaction FAD + 2 e- + 2 H+ FADH2 E 0.00 V for

Question:

For the half-reaction
FAD + 2 e- + 2 H+ ⇆ FADH2
E °′≈ 0.00 V for FAD bound to succinate dehydrogenase.
(a) Calculate ΔG°′ for the oxidation of succinate to fumarate by enzyme-bound FAD.
(b) How does this compare to the ΔG°′ for the oxidation of succinate to fumarate by free NAD+?
(c) Based on these results, explain why nature chose FAD rather than NAD+ as the oxidizing agent in the succinate dehydrogenase reaction.