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

Question

Quizplus · Accepted Answer

The three additional ATP molecules are used to regenerate ribulose-1,5-bisphosphate (RuBP), the starter molecule for the Calvin cycle, allowing the cycle to continue.

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