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ATP synthesis in chloroplasts using light energy is called

(a) photorespiration Your answer
(b) photophosphorylation Correct
(c) substrate-level phosphorylation Your answer
(d) oxidative phosphorylation Your answer

Your answer: Correct answer: (b)

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Explanation

Why (b) is correct

The synthesis of ATP from ADP and phosphate using light energy in the chloroplast is called photophosphorylation.

Why the other options are wrong

(a) · your answer Photorespiration uses O₂ and releases CO₂; it does not make ATP.
(c) · your answer Substrate-level phosphorylation makes ATP directly from a substrate, as in glycolysis.
(d) · your answer Oxidative phosphorylation is ATP synthesis in mitochondria during respiration.

NCERT point: Photophosphorylation can be cyclic (ATP only) or non-cyclic (ATP + NADPH).

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