Question

${NAD}^{+}$ and ${NADP}^{+}$ resemble each other in their ability to

• A. Give out a proton
• B. Take up two electrons at a time
• C. Take up two hydrogen atoms
• D. Take up one electron at one time

Answer 1

The correct option is B Take up two electrons at a time

NAD and NADP are cofactors of enzymes found in many living organisms. They are both derived from water soluble vitamin B3, niacin. The enzyme NAD kinase converts NAD to NADP. They act as electron carriers and transporters in various enzyme catalyzed redox reactions.

NAD⁺/NADP⁺ +2e^-= NADH/NADPH. So, the correct answer is 'Take up two electrons at a time'.