Twelve PGAL molecules form when six carbon dioxide molecules are attached to six RuBP molecules. Only two of these PGAL molecules are needed to form a 6-carbon sugar. What is the fate of the 10 remaining PGAL molecules?
A)They are degraded.
B)They are converted back to carbon dioxide.
C)They are stored as extra PGAL molecules.
D)They are used during photorespiration.
E)They are converted to RuBP molecules.

Question

Quizplus · Accepted Answer

The 10 remaining PGAL (phosphoglyceraldehyde) molecules are used in the Calvin cycle to regenerate RuBP (ribulose bisphosphate), allowing the cycle to continue and facilitate further carbon fixation.

Twelve PGAL Molecules Form When Six Carbon Dioxide Molecules Are