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Solution


Q.

Number of carboxylation occurs in Calvin cycle is
 a) Zero         b) One             c) Two             d) Three
1 A
2 B
3 C
4 D

Ans.

(b) The Calvin cycle occurs in the stroma of chloroplast of C_3 plants and consists of three main parts, i.e., carboxylation, reduct5ion and regeneration. Carboxylation involves addition of carbon dioxide to ribulose 1,5-bisphosphate in presence of RUBISCO enzyme to form 3-PGA (3-phosphoglyceric acid), i.e., single carboxylation  occurs in Calvin cycle.