During aerobic cellular respiration, which metabolic stage generates the vast majority of ATP molecules via oxidative phosphorylation?
Answer and explanation
Correct answer: B. Electron transport chain and chemiosmosis
- Step 1: Glycolysis yields net 2 ATP, and the Krebs cycle yields 2 ATP. Step 2. The electron transport chain and ATP synthase chemiosmosis generate approximately 26–28 ATP per glucose molecule. Answer: Electron transport chain and chemiosmosis. Why not the others: Oxidative phosphorylation driven by the proton gradient yields the overwhelming majority of cellular ATP.
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