Question: Which of the following reactions in the TCA cycle is coupled to a substrate-level phosphorylation…

Which of the following reactions in the TCA cycle is coupled to
a substrate-level phosphorylation reaction?

A. Acetyl CoA + oxaloacetate → citrate + CoA

B. Isocitrate + NAD+ → α-ketoglutarate + NADH + CO2.

C. α-ketoglutarate + NAD+ + CoA → succinyl CoA + NADH + CO2.

D. Succinyl CoA → succinate + CoA

E. Succinate → fumarate