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Photosynthesis
The Light-Independent Reactions of Photosynthesis
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Concept Version 11
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The Calvin Cycle

The Calvin Cycle

The Calvin Cycle

The Calvin cycle has three stages. In stage 1, the enzyme RuBisCO incorporates carbon dioxide into an organic molecule, 3-PGA. In stage 2, the organic molecule is reduced using electrons supplied by NADPH. In stage 3, RuBP, the molecule that starts the cycle, is regenerated so that the cycle can continue. Only one carbon dioxide molecule is incorporated at a time, so the cycle must be completed three times to produce a single three-carbon GA3P molecule, and six times to produce a six-carbon glucose molecule.

Source

    Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:

    "OpenStax College, Using Light Energy to Make Organic Molecules. October 16, 2013."
    http://cnx.org/content/m44449/latest/Figure_08_03_02f.png OpenStax CNX CC BY 3.0.

Related Terms

  • rubisco
  • light-independent reaction
  • ribulose bisphosphate
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