Difference between Oxidative Phosphorylation and Photophosphorylation

Oxidative phosphorylation
Oxidative Phosphorylation
1. Occurs during respiration.
2. Occurs inside mitochondria.
3. Pigment systems are not involved.
4. ATP is produced from ADP and inorganic phosphate by utilizing energy released during electron transport.
5. Molecular oxygen is required for terminal oxidation.
6. The ATP molecules produced are released into the cytoplasm and this energy molecules are used to carry out various metabolic reactions of the cell.

1. Occurs during photosynthesis.
2. Occurs inside chloroplast.
3. Pigment systems (PS-I and PS-II) are involved.
4. Sunlight is the external energy source for photophosphorylation.
5. Molecular oxygen is not required for photophosphorylation.
6. The ATP molecules produced is used to fix CO2 to carbohydrates in dark reaction.
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