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Oxidative phosphorylation is production of

1. ATP in photosynthesis
2. NADPH in photosynthesis
3. ATP in respiration
4. NADH in respiration

Correct answer: ATP in respiration

Solution

Oxidative phosphorylation is the stage of cellular respiration where energy from electron transport is used to make ATP. It occurs after electrons pass through the respiratory chain and the resulting proton gradient powers ATP synthase.

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