What happens in the second phase of the Calvin cycle? A) A molecule of CO₂ reacts with a phosphorylated five-carbon compound, ribulose bisphosphate. B) Two G3P molecules are removed from the cycle. C) ATP and NADPH are used to convert the PGA molecules to glyceraldehyde-3-phosphate. D) Thirty carbons and their associated atoms become rearranged into six molecules of ribulose phosphate. E) RuBP molecules begin the process of CO₂ fixation.

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Quizplus · Accepted Answer

In the second phase of the Calvin cycle, ATP and NADPH produced by the light-dependent reactions are used to convert 3-phosphoglycerate (PGA) molecules into glyceraldehyde-3-phosphate (G3P), a three-carbon sugar. This phase is also known as the reduction phase.

What Happens in the Second Phase of the Calvin Cycle