Botany - Photosynthesis in Higher Plants Question with Solution | TestHub

${\mathrm{CO}}_2$ acceptor molecule in ${\mathrm{C}}_4$ plants is phosphoenol pyruvate (PEP). ${\mathrm{C}}_4$ plants are more efficient in picking up ${\mathrm{CO}}_2$ even when it is found in low concentration because of high affinity of PEP. PEP carboxylase (PEPcase) is the key enzyme which catalyses the primary fixation of ${\mathrm{CO}}_2$.