In the process of carbon fixation, three molecules of rubp combine with three molecules of co₂ to produce three six-carbon molecules, which are then split to produce 6 molecules of 3-phosphoglycerate. after phosphorylation and reduction produce 6 glyceraldehyde 3-phosphate (g3p), what more needs to happen to complete the calvin cycle?

Regeneration of RuBP

Explanation:

The Calvin cycle (C3), which is also referred to as the light independent reaction occurs after the light stage of photosynthetis. It occurs mainly in three stages viz: Carbon fixation and reduction stage has been mentioned in the question

The third stage is the regeneration stage.

After the synthesis of 6molecules of G-3-P which requires NADPH and ATP as sources of hydrogen and energy respectively, one of the G-3-P molecules is exported out of the cycle in order to contribute to the formation of other compounds (glucose molecule). The remaining 5molecules of Glyceraldehyde-3-phosphate is then used in a series of chemical reactions to regenerate the CO2 acceptor, RUBP, which will then continue CO2 assimilation for the Calvin cycle to continue. The NADP+ and ADP molecules produced during the reduction of PGA to 3GP will return to the light stage to continue the process as well.

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