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Question

In dark reaction, first reaction is

A
Carboxylation
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B
Decarboxylation
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C
Dehydrogenation
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D
Deamination
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Solution

The correct option is A Carboxylation
Calvin cycle or dark reaction begins with fixation of CO2 into 3 C sugar by the process of carboxylation. RUBISCO, present in the chloroplast stroma catalyzes carboxylation of ribulose-1, 5-biphosphate (RuBP) followed by immediate splitting of unstable product into 3-phosphoglyceric acid. The correct answer is A.

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