High School

For every 3 molecules of CO₂ that enter the Calvin cycle, how many G3P are formed?

Only ______ is net, the other _______ G3P molecules are recycled to regenerate RuBP.

Answer :

Final answer:

In the Calvin cycle, for every 3 CO₂ molecules that are fixed, 6 G3P molecules are produced, with 1 net G3P exiting the cycle and the remaining 5 being recycled to regenerate RuBP.

Explanation:

For every 3 molecules of CO₂ that enter the Calvin cycle, a total of 6 molecules of G3P (glyceraldehyde-3-phosphate) are formed, but only one G3P is net, the other five G3P molecules are recycled to regenerate RuBP (ribulose bisphosphate).

This regeneration process is essential because it prepares the system for the fixation of more CO₂ molecules. The net G3P that leaves the Calvin cycle contributes to the formation of various important compounds, including carbohydrates like glucose, which are vital for the plant.

Learn more about Calvin cycle here:

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