Class 11 NEET Biology Photosynthesis in Higher Plants

The calvin cycle proceeds in three stages: (A) Carboxylation, during which $\mathrm{CO}_2$ combines with ribulose-1,5-bisphosphate. (B) Reduction, during which carbohydrate is formed at the expense of the photochemically made ATP and NADPH. (C) Regeneration during which the $\mathrm{CO}_2$ acceptor ribulose-1,5-bisphosphate is formed again so that the cycle continues.