Question:

Fixation of one molecule of $ CO_{2} $ through Calvin cycle requires

Updated On: Jul 27, 2022
  • 3 ATP and 3 $ NADPH_2$ molecules
  • 3 ATP and 2 $NADPH_2$ molecules
  • 2 ATP and 1 $ NADPH_2$ molecule
  • 1 ATP and 2 $NADPH_2 $ molecules
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The Correct Option is B

Solution and Explanation

$2$ ATP are required during conversion of PGA to $1,3$ diphosphoglyceric acid and $1$ ATP during conversion of glyceraldehyde phosphate to ribulose biphosphate. $2 NADH _{2}$ molecules are utilized for converting $1,3$ diphosphoglyceric acid to glyceraldehyde phosphate.
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Top Questions on Photosynthesis in higher plants

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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)