Phosphoenolpyruvate (PEP) is the primary C O 2 acceptor in:
Phosphoenolpyruvate (PEP) is the primary acceptor in:
$C_{3}$ plants
$C_{4}$ plants
$C_{2}$ plants
$C_{3}$ and $C_{4}$ plants
Solution
PEP is a $3C$ compound which serves as primary $CO_2$ acceptor in the mesophyll cell cytoplasm of $C_4$ plants like Maize, Sugarcane, \textit{Sorghum} etc. PEP is able to rapidly fix carbon at very low concentrations of hydrogen carbonate in presence of Phosphoenolpyruvate carboxylase enzyme the addition of bicarbonate $(HCO_3^-)$ to phosphoenolpyruvate $(PEP)$ to form the four-carbon compound oxaloacetate and inorganic phosphate $PEP + HCO_3^- \rightarrow oxaloacetate + Pi$