Question

Which among the following statements is correct about nicotinamide adenine dinucleotide?

• A. ${\mathrm{NAD}}^{+}$, an oxidizing agent, can accept electrons and protons from organic molecules and get reduced to $\mathrm{NADH}$
• B. ${\mathrm{NAD}}^{+}$, a reducing agent, can donate its electrons and protons to organic molecules
• C. ${\mathrm{NAD}}^{+}$, an oxidizing agent, can accept electrons from organic molecules and get reduced to ${\mathrm{NADH}}_2$
• D. ${\mathrm{NAD}}^{+}$, a reducing agent, can donate its electrons and protons to inorganic molecules

Answer 1

The correct option is A ${\mathrm{NAD}}^{+}$, an oxidizing agent, can accept electrons and protons from organic molecules and get reduced to $\mathrm{NADH}$

Nicotinamide adenine dinucleotide
(${\mathrm{NAD}}^{+}$) is a cofactor. It acts as an oxidising agent which can accept electrons and protons from organic molecules and get itself reduced to
$\mathrm{NADH}$. The $\mathrm{NADH}$ is again used as reducing agent to donate electrons.