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During photosynthesis, when is CO 2 utilized? 1.During the light reactions only 2.During the Calvin cycle...

During photosynthesis, when is CO 2 utilized?
1.During the light reactions only
2.During the Calvin cycle only
3.During both the light reactions and the Calvin cycle
4.During neither the light reactions nor the Calvin cycle

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Answer #1

The right answer to the question is second option. CO2 is utilized only in the light independent reactions or the Calvin cycle only. Calvin cycle is also known as citric acid cycle. The light dependent reaction occurs in the lumen and splitting of water takes place where oxygen is liberated. The Calvin cycle takes place in the plant's chloroplasts.

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