General Science • BiologyHard
During the light-independent reactions of photosynthesis, carbon dioxide is fixed into organic molecules within which specific region of the chloroplast?
A. Thylakoid membrane
B. Stroma✓ Correct Answer
C. Cristae
D. Intermembrane space
💡 Solution & Explanation
The Calvin cycle or light-independent reactions take place within the fluid-filled stroma of the chloroplast, where enzymes like ribulose bisphosphate carboxylase oxygenase fix carbon dioxide into sugars. The light-dependent reactions occur across the thylakoid membranes containing photosystems. Stroma contains chloroplast DNA, ribosomes, and various enzymes required for carbon assimilation.
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