Every molecule of NADH. fed into ETC produces?
Correct answer: B. 3ATP
- A. 2ATP
- B. 3ATP
- C. 4ATP
- D. 6ATP
Explanation
Every molecule of NADH fed into the electron transport chain (ETC) produces 3 ATP.NADH is a coenzyme that carries electrons from the Krebs cycle to the ETC. As NADH passes its electrons down the ETC, it releases energy that is used to pump protons across the inner mitochondrial membrane. This creates a proton gradient, which drives the synthesis of ATP by the enzyme ATP synthase.For every NADH molecule that is oxidized, 10 protons are pumped across the inner mitochondrial membrane. This creates enough energy to synthesize 3 ATP molecules.
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About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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