The Calvin cycle A) generates ATP and NADPH. B) is part of photorespiration. C) uses CO₂ to synthesize the sugar phosphate G3P. D) adds O₂ to RuBP. E) is not always dependent upon photosynthesis for energy.

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Quizplus · Accepted Answer

The Calvin cycle uses CO2 to synthesize the sugar phosphate G3P, which is the basis for glucose and other organic compounds. This synthesis involves the addition of carbon to an existing molecule, namely RuBP (ribulose 1,5-bisphosphate), which is then transformed into an unstable intermediate that eventually leads to G3P. The cycle also requires ATP and NADPH, which are produced during the light-dependent reactions of photosynthesis. However, the Calvin cycle can also function in the absence of light, as long as it is provided with these energy-rich molecules from other sources.

The Calvin Cycle