Question

what happens during the regeneration stage of the calvin cycle (light - independent reactions)? a. oxygen is produced through this process. b. the enzyme rubisco attaches co2 to rubp, causing the formation of molecules of 3 - phosphoglycerate. c. the remaining g3p molecules that have not exited the cycle are used to re - form rubp through a series of chemical reactions, so that the calvin cycle can continue. d. energy from atp and electrons from nadph are used to reduce 3 - phosphoglycerate to form g3p molecules (which can be used to form other organic molecules such as glucose).

Explanation:

The regeneration stage of the Calvin - cycle involves using the remaining glyceraldehyde - 3 - phosphate (G3P) molecules that have not left the cycle to reform ribulose - 1,5 - bisphosphate (RuBP) via a series of chemical reactions, allowing the cycle to continue. Oxygen is produced in the light - dependent reactions, not in the Calvin cycle. Option B describes the carbon - fixation stage. Option D describes the reduction stage.

Answer:

C. The remaining G3P molecules that have not exited the cycle are used to re - form RuBP through a series of chemical reactions, so that the Calvin cycle can continue.