The Production of Glyceraldehyde 3-Phosphate (G3P) in the Calvin Cycle

question 6

Multiple Choice

The production of glyceraldehyde 3-phosphate (G3P) in the Calvin cycle requires six molecules each of ATP and NADPH. Another three molecules of ATP are then used in the cycle. What is the purpose of these three additional ATP molecules?

• A) to regenerate the starter molecule RuBP
• B) to attract the next CO ₂ molecule to enter the Calvin cycle
• C) to reduce the molecules of G3P to form glucose
• D) to join acetyl CoA into pyruvate, preparing it to enter the citric acid cycle
• E) to fix carbon dioxide to RuBP

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