The Calvin cycle occurs in the stroma of chloroplasts in plant cells. It does not require light directly, as it is termed a "light-independent" reaction. However, it relies on the ATP and NADPH produced during the light-dependent reactions of photosynthesis, which do require light.

Question

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Answer 1

The Calvin cycle happens in the stroma, which is the fluid inside chloroplasts in plant cells. It’s called a "light-independent" reaction because it doesn’t need light to work right away. But it still depends on ATP and NADPH, which are like energy and building blocks that come from the light-dependent reactions of photosynthesis that do need light. So even though the Calvin cycle doesn't use light directly, it still relies on the stuff made during the light reactions!