Question

where in the citric acid cycle does nadh regulate enzyme activity?

i dont know yet
fumarate → malate
isocitrate → alpha - ketoglutarate
succinyl - coa → succinate
citrate → isocitrate

Explanation:

In the citric acid cycle, the conversion of isocitrate to alpha - ketoglutarate is catalyzed by isocitrate dehydrogenase. This reaction produces NADH. NADH can act as a feedback inhibitor to regulate the activity of isocitrate dehydrogenase.

Answer:

Isocitrate → alpha - ketoglutarate