Q35 / 200 · NEET 2024 (Re-NEET) · Botany

Observe the given figure. Identify the different stages labelled with alphabets by selecting the correct option. Figure

  • A
    A-Carboxylation, B-Regeneration, C-Reduction
  • B
    A-Reduction, B-Decarboxylation, C-Regeneration
  • Correct answer
    C
    A-Carboxylation, B-Reduction, C-Regeneration
  • D
    A-Reduction, B-Carboxylation, C-Regeneration

Solution

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.

Hence, the correct answer is option: 'C'.

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