Photosynthesis occurs in ______ of the ______.

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Multiple Choice

Photosynthesis occurs in ______ of the ______.

Photosynthesis takes place in chloroplasts, not mitochondria, of plant cells and some algae. It involves two main stages: the light-dependent reactions that capture energy from light to produce ATP and NADPH, and the Calvin cycle that uses those energy carriers to fix carbon and synthesize sugars. The chloroplasts provide the specialized compartments for these steps—the thylakoid membranes carry the light reactions, while the stroma hosts the Calvin cycle. The mitochondria are where cellular respiration occurs, not photosynthesis, so placing photosynthesis there would be incorrect. There are two stages, not one or three, in the standard description of photosynthesis.

Photosynthesis takes place in chloroplasts, not mitochondria, of plant cells and some algae. It involves two main stages: the light-dependent reactions that capture energy from light to produce ATP and NADPH, and the Calvin cycle that uses those energy carriers to fix carbon and synthesize sugars. The chloroplasts provide the specialized compartments for these steps—the thylakoid membranes carry the light reactions, while the stroma hosts the Calvin cycle. The mitochondria are where cellular respiration occurs, not photosynthesis, so placing photosynthesis there would be incorrect. There are two stages, not one or three, in the standard description of photosynthesis.

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