In the context of the C_4 pathway,the first s | vedclass

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Question

(C) In the $C_4$ pathway (Hatch-Slack cycle),the primary $CO_2$ acceptor is a $3$-carbon molecule called Phosphoenolpyruvate $(PEP)$.This reaction is

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$CO_2$ combines with $PEP$.

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(C) In the $C_4$ pathway (Hatch-Slack cycle),the primary $CO_2$ acceptor is a $3$-carbon molecule called Phosphoenolpyruvate $(PEP)$.This reaction is catalyzed by the enzyme $PEP$ carboxylase $(PEPCase)$ in the mesophyll cells.The $CO_2$ combines with $PEP$ to form a $4$-carbon compound called Oxaloacetic acid $(OAA)$.Therefore,the first step involves the fixation of $CO_2$ by $PEP$.

In the context of the $C_4$ pathway,the first step is .........

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