Question

Passage of two pairs of electrons from NADH molecules to oxygen will pump out

• A. 2 ATP molecules
• B. 3 ATP molecules
• C. 4 ATP molecules
• D. 6 ATP molecules

Answer 1

The correct option is D 6 ATP molecules

Each molecule of NADH donates one pair of electrons (two electrons) in electron transport chain (ETC).

Transfer of one pair of electrons from one molecule of NADH gives rise to 3 molecules of ATP.

Therefore, passage of two pairs of electrons from NADH molecules to oxygen in ETC will pump out 6 ATP molecules.