The third stage of the three-stage Calvin cycle
A) uses ATP and NADPH from the light reactions.
B) generates a glucose molecule for the plant.
C) is similar to the reactions found in the glycolysis pathway.
D) regenerates a C5 sugar for the Calvin cycle to continue.

Question

Quizplus · Accepted Answer

The third stage of the Calvin cycle, known as regeneration of RuBP, involves the formation of a C5 sugar called ribulose-1,5-bisphosphate (RuBP) from two molecules of glycerate-3-phosphate (PGA). This regeneration allows the cycle to continue and produce more glucose. The ATP and NADPH produced during the light reactions are used in the first stage of the Calvin cycle, and the cycle itself does not directly generate glucose molecules. The reactions in the glycolysis pathway are not directly involved in the Calvin cycle.

The Third Stage of the Three-Stage Calvin Cycle