Question

What is the role of ${\text{NAD}}^{+}$ in cellular respiration?

• A. It functions as an electron carrier
• B. It is the final electron acceptor for anaerobic respiration
• C. It functions as an enzyme
• D. It is a nucleotide source for ATP synthesis

Answer 1

The correct option is A It functions as an electron carrier

The ${\text{NAD}}^{+}$ is a coenzyme nicotinamide adenine dinucleotide, which acts as an electron acceptor in the process of glycolysis and Krebs cycle. It takes part in various metabolic processes. NAD is the electron carrier that picks the electron from other molecules and gets reduced to form NADH. It is thus used as a reducing agent to donate electrons.

Hence, option B is correct.