Photosynthesis In Higher Plants

Question
CBSEENBI11003477

The 1st COfixation product of Cplant is

  • Oxaloacetic acid

  • ribulose biphosphate

  • phosphoenolpyruvate

  • phosphoglyceric acid.

Solution

A.

Oxaloacetic acid

In C4 Plants, initial fixation of carbon dioxide occurs in mesophyll cells. The primary acceptor of CO2 i.e. phosphoenol pyruvate (PEP) combines with CO2 in the presence of PEP carboxylase or PEPcase to form oxaloacetic acid, which is the first stable carbon dioxide fixation product in Cpathway.

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