BiologyCell Biology

Light-Independent Reaction (Rxn): Where Does It Occur in a Plant Cell?

Locate the light-independent reaction (rxn) in the plant chloroplast stroma. Compare thylakoid, outer membrane, and mesophyll options with explanations.

Question

In which compartment of the plant cell do the light-independent reactions of photosynthesis take place?

A. thylakoid B. stroma C. outer membrane D. mesophyll

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Evidence boundary

This answer addresses the cited plant-cell location question with all four original options. “Rxn” is expanded to “reaction” in the title. The stroma answer is scoped to plant chloroplasts; it is not a claim that photosynthetic prokaryotes possess chloroplasts. No measured photosynthetic rate or experimental result is inferred.