Which Chemical Reaction of the Krebs Cycle Produces FADH₂

Question

Which chemical reaction of the Krebs cycle produces FADH2?
A) Succinate $\rightarrow$ fumarate
B) Citrate $\rightarrow$ isocitrate
C) Fumarate $\rightarrow$ malate
D) Isocitrate $\rightarrow$ $\alpha$-ketoglutarate

Accepted Answer

The conversion of succinate to fumarate in the Krebs cycle is catalyzed by the enzyme succinate dehydrogenase, which produces FADH2.