A) 0
B)
C) 2
D) 3
Correct Answer: B
Solution :
The Calvin cycle occurs in the stroma of chloroplast of \[{{C}_{3}}\] plants and consists of three main parts i.e., carboxylation, reduction and regeneration. Carboxylation involves addition of \[C{{O}_{2}}\] to Ribulose 1-5 bisphosphate in presence of Rubisco enzyme to form 3PGA (3 phosphoglyceric acid) i.e., single carboxylation occur in Calvin cycle. In \[{{C}_{4}}\] plants two carboxylation occurs, the first in mesophyll cell and the second in bundle sheath cells.
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