What is the primary role of the light-independent reactions (Calvin cycle) of photosynthesis in C3 chloroplasts?
Answer and explanation
Correct answer: D. Fixing atmospheric carbon dioxide into 3-phosphoglycerate and triose phosphates
- Step 1: The Calvin cycle operates in the stroma using RuBisCO to fix with ribulose-1,5-bisphosphate into 3-PGA. Step 2. ATP and NADPH from light reactions power reduction into G3P sugars. Answer: Fixing atmospheric carbon dioxide into 3-phosphoglycerate and triose phosphates. Why not the others: Water photolysis and ATP generation occur during light-dependent thylakoid reactions.
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