The mechanism for ATP synthesis is_____________?
Correct answer: D. Chemiosmosis
- A. Chemosynthesis
- B. Photosynthesis
- C. Phosphorylation
- D. Chemiosmosis
Explanation
Chemiosmosis synthesizes ATP by using the flow of protons through ATP synthase down their electrochemical gradient, which drives phosphorylation of ADP. Photosynthesis and chemosynthesis are energy-producing pathways, not the specific mechanism of ATP formation. Students may choose phosphorylation because ATP is formed by adding phosphate, but phosphorylation describes the chemical step rather than the proton-driven mechanism.
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