FADH2 is similar to NADH in that it is also oxidized by the respiratory electron transport chain. However, oxidation of FADH2 does not yield as much ATP as the oxidation of NADH. Why doesn't oxidation of FADH2 generate as much ATP as oxidation of NADH?

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Q29. FADH2 is similar to NADH in that it is also oxidized by the respiratory electron transport chain. However, oxidation of FADH2 does not yield as much ATP as the oxidation of NADH.

Why doesn't oxidation of FADH2 generate as much ATP as oxidation of NADH?

 

A. Energy is more spread out in FADH2.

B. FADH2 has fewer C-H bonds than NADH.

C. FADH2 oxidation occurs at complex II; it therefore bypasses the proton-pumping of Complex I.

D. FADH2 oxidation to FAD releases fewer electrons than the oxidation of NADH to NAD+.

 
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