Question:

For yielding one molecule of glucose the Calvin cycle turns

Updated On: Jun 21, 2022
  • two times
  • four times
  • six times
  • eight times
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The Correct Option is C

Solution and Explanation

Conversion of $ CO_{2} $ to simple (reduced) organic compounds is called $ CO_{2} $ assimilation or $ CO_{2} $ fixation or carbon fixation. This fixation pathway was elucidated in the early $1950\,s$ by Melvin Calvin and co-workers and is often called as Calvin cycle. Since one molecule of carbon is fixed in one tum of the Calvin cycle. So, six turns of the cycle are required to fix the glucose molecule containing $6$ carbon atoms.
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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)