Question

What role does NAD+ play in redox reactions?

a) Electron donor
b) Electron acceptor
c) Both a and b
d) Neither a nor b

Answer 1

NAD+ plays a dual role as both an electron donor and an electron acceptor in redox reactions.

Step-by-step explanation:

NAD+ plays a role as both an electron donor and an electron acceptor in redox reactions.

As an electron donor, NAD+ accepts electrons and protons from organic molecules, reducing itself to NADH. This process involves the transfer of high-energy electrons, which can be used to generate ATP.

As an electron acceptor, NAD+ is oxidized back to NAD+ by transferring electrons and protons to other molecules in metabolic pathways.