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Which one of the following is represented by Calvin cycle?

1. Reductive carboxylation
2. Oxidative carboxylation
3. Photophosphorylation
4. Oxidative phosphorylation

Correct answer: Reductive carboxylation

Solution

The Calvin cycle is the photosynthetic carbon-fixation pathway, where CO2 is incorporated into organic compounds. Because it uses energy and reducing power to convert CO2 into a reduced form, it is called reductive carboxylation.

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