Where does CO2 fixation occur in the Calvin cycle?

Where does CO2 fixation occur in the Calvin cycle?

• A. The Calvin cycle fixes CO2 into organic molecules in the chloroplast stroma, using ATP and NADPH; RuBisCO is a key enzyme.
• B. The Calvin cycle occurs in the thylakoid lumen and uses ATP to generate NADPH.
• C. The Calvin cycle fixes CO2 in mitochondria with FAD as a cofactor.
• D. The Calvin cycle uses sunlight directly to convert CO2 to glucose.

Answer: (A)