Which of the Following Statements Describes NAD⁺

Question

Which of the following statements describes NAD⁺?
A) NAD+ is reduced to NADH during glycolysis, pyruvate oxidation, and the citric acid cycle.
B) NAD⁺ has more chemical energy than NADH.
C) NAD⁺ is oxidized by the action of hydrogenases.
D) NAD⁺ can donate electrons for use in oxidative phosphorylation.
E) In the absence of NAD+, glycolysis can still function.

Accepted Answer

NAD⁺ is a coenzyme that is involved in redox reactions. It accepts electrons and becomes reduced to NADH. This occurs during glycolysis, pyruvate oxidation, and the citric acid cycle. The reduction of NAD⁺ to NADH is an important step in these pathways as it allows for the eventual production of ATP through oxidative phosphorylation.