Photorespiration in C-4 plants starts from:

Correct answer: B. Phosphoenol pyruvate

  • A. Phosphoglycerate
  • B. Phosphoenol pyruvate
  • C. Glycerate
  • D. Glycine

Explanation

The C4 pathway initiates with a molecule called phosphoenolpyruvate (PEP) which is a 3-carbon molecule. This is the primary CO2 acceptor and the carboxylation takes place with the help of an enzyme called PEP carboxylase.

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