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CBSE Class 11-science Answered

Difference between oxidative photophosphorylation and photophosphorylation
Asked by anirbanbag81 | 16 Jan, 2018, 08:25: AM
answered-by-expert Expert Answer

Differences between oxidative phosphorylation and photophosphorylation:

Oxidative phosphorylation

Photophosphorylation

  • Occurs during respiration.
  • Occurs during photosynthesis.
  • Occurs inside mitochondria.
  • Occurs inside chloroplast.
  • Pigment systems are not involved.
  • Pigment systems (PS-I and PS-II) are involved.
  • ATP is produced from ADP and inorganic phosphate by utilising energy released during electron transport.
  • Sunlight is the external energy source for photophosphorylation.
  • Molecular O2 is required for terminal oxidation.
  • Molecular O2 is not required for photophosphorylation.
  • ATP molecules produced are released into the cytoplasm and these energy molecules are used to carry out various metabolic reactions of the cell.
  • ATP molecules produced are used to fix CO2 to carbohydrates in dark reaction.
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