AP Biologymediummcq1 pt
In the light reactions, ATP is made by
A.chemiosmosis through ATP synthase
B.substrate-level phosphorylation in the stroma
C.direct photon absorption by ATP
D.glycolysis in the chloroplast
Explanation
Core Concept
Electron transport pumps H⁺ into the thylakoid lumen; the gradient then flows back through ATP synthase, driving phosphorylation. Same principle as mitochondria.
Correct Answer
Achemiosmosis through ATP synthase
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