Question

Oxidation of one molecule of NADH gives rise to ATP molecules while that of one $FAD{H}_2$ molecule generates molecules of ATP.

• A. four
• B. five
• C. two
• D. three

Answer 1

Answer: (C), (D)

three

Each NADH gives 3 molecules of ATP and each $FAD{H}_2$ gives 2 molecules of ATP on oxidation. The energy released in the cellular respiration process is expressed in terms of number of ATP molecules released and hence these conversion factors are significant.