- A Thylakoid membrane
- B Cytoplasm
- C Stroma of chloroplast
- D Mitochondria
Correct answer: C. Stroma of chloroplast
Explanation: The Calvin cycle (dark reactions) occurs in the stroma of the chloroplast. It uses ATP and NADPH to fix CO2 into sugars.
Concept context
Light reactions, the Calvin cycle, C3/C4/CAM pathways, photorespiration, and factors affecting the rate of photosynthesis. One of the highest-yield NEET chapters.