Primary acceptor of CO_{2} in C_{4}-cycle is | vedclass

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(B) In $C_{4}$ plants, the initial fixation of carbon dioxide occurs in the mesophyll cells.The primary acceptor of $CO_{2}$ is phosphoenol pyruvate $

Vedclass · Accepted Answer

$PEP$

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(B) In $C_{4}$ plants, the initial fixation of carbon dioxide occurs in the mesophyll cells.The primary acceptor of $CO_{2}$ is phosphoenol pyruvate $(PEP)$.It combines with carbon dioxide in the presence of the enzyme $PEP$ carboxylase to form oxaloacetic acid $(OAA)$.The reaction is as follows:$PEP + CO_{2} + H_{2}O \xrightarrow{PEP 	ext{ carboxylase}} 	ext{Oxaloacetic acid} + H_{3}PO_{4}$

Primary acceptor of $CO_{2}$ in $C_{4}$-cycle is

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