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Multiple Choice
In the context of organic chemistry, what is the primary source of energy for the Calvin cycle?
A
Oxygen
B
Carbon dioxide
C
ATP and NADPH
D
Glucose
Verified step by step guidance
1
The Calvin cycle is a series of biochemical reactions that occur in the stroma of chloroplasts in photosynthetic organisms. It is part of the process of photosynthesis, which converts light energy into chemical energy.
The primary purpose of the Calvin cycle is to convert carbon dioxide and water into glucose, using the energy derived from ATP and NADPH produced during the light-dependent reactions of photosynthesis.
ATP (adenosine triphosphate) provides the energy required for the chemical reactions in the Calvin cycle, while NADPH (nicotinamide adenine dinucleotide phosphate) provides the reducing power needed to convert carbon dioxide into glucose.
During the Calvin cycle, carbon dioxide is fixed into a stable intermediate, which is then reduced and converted into glucose. This process requires energy input from ATP and reducing power from NADPH.
Thus, the primary source of energy for the Calvin cycle is ATP and NADPH, which are generated during the light-dependent reactions of photosynthesis.