How many molecules of NAD are reduced as one molecule of pyruvate is metabolized through one turn of the Krebs cycle?

Question

Quizplus · Accepted Answer

One molecule of pyruvate enters the Krebs cycle and is oxidized to produce three NADH and one FADH2, which will reduce a total of four molecules of NAD (three from NADH and one from the oxidation of pyruvate). So, four molecules of NAD are reduced during one turn of the Krebs cycle.

How Many Molecules of NAD Are Reduced as One Molecule