Question:

The primary $CO_{2}$ acceptor in $C_{4}$ pathway is $3$-carbon molecule phosphoenol pyruvate $(PEP)$. The enzyme responsible for this fixation is $PEP$ carboxylase or $PEP$case.

Updated On: Jul 6, 2022
  • If both assertion and reason are true and reason is the correct explanation of assertion
  • If both assertion and reason are true but reason is not the correct explanation of assertion
  • If assertion is true but reason is false
  • If both assertion and reason are false
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The Correct Option is B

Solution and Explanation

Primary acceptor of $CO_{2}$ in $C_{4}$ plants is phosphoenol pyruvic acid $(PEP)$. Carboxylation is catalysed by enzyme $PEP$ carboxylase ($PEP$Case). First stable product in $C_{4}$ plant is $OAA$ (oxaloacetic acid), a $4C$ compound.
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Notes on Photosynthesis in higher plants

Concepts Used:

Photosynthesis in Higher Plants

Processes Of Photosynthesis in Higher Plants:

Photosynthesis in higher plants involves the following processes:

  • Light Reaction
  • Dark Reaction

Light Reaction:

  • This phenomenon occurs in the presence of light.
  • The pigment absorbs light and produces energy in the form of ATP.
  • The process involves- absorption of light, water splitting, the release of oxygen, and formation of ATP and NADPH.

Dark Reaction:

This process occurs in the absence of light in the stroma of the chloroplasts. The following cycles are involved in the process:

  1. Calvin Cycle (C3 Cycle)
  2. C4 Cycle (Hatch and Slack Pathway)