Botany - Photosynthesis in Higher Plants Question with Solution | TestHub

In ${\mathrm{C}}_4$ plants, initial fixation of carbon dioxide occurs in mesophyll cells. The primary acceptor of ${\mathrm{CO}}_2$ i.e., phosphoenol pyruvate (PEP) combines with ${\mathrm{CO}}_2$ in the presence of PEP carboxylase or PEPcase to form oxaloacetic acid, which is the first stable carbon dioxide fixation product in ${\mathrm{C}}_4$ pathway.