2024 Re-NEET Photosynthesis in Higher PlantsCalvin cycle (C3 pathway) stages Medium Question 16 of 91 in Photosynthesis in Higher Plants

Observe the given figure (Calvin cycle). Identify the different stages labelled with alphabets by selecting the correct option.

A A-Carboxylation, B-Regeneration, C-Reduction
B A-Reduction, B-Decarboxylation, C-Regeneration
C A-Carboxylation, B-Reduction, C-Regeneration
D A-Reduction, B-Carboxylation, C-Regeneration

The answer is C.

Solution

The Calvin cycle consists of three stages: Carboxylation (fixation of $CO_2$ onto RuBP to form 3-phosphoglycerate, stage A), Reduction (conversion of 3-phosphoglycerate to triose phosphate using ATP and NADPH, stage B), and Regeneration (regeneration of RuBP from triose phosphate to continue the cycle, stage C).

Concept Calvin cycle (C3 pathway) stages

Photosynthesis in Higher Plants in past papers

91 questions from this chapter have appeared across 26 exam years.