Questions: Part A Which of the following processes occurs in the Calvin cycle? reduction of NADPH release of oxygen production of ATP reduction of CO2

Part A Which of the following processes occurs in the Calvin cycle? reduction of NADPH release of oxygen production of ATP reduction of CO2
Transcript text: Part A Which of the following processes occurs in the Calvin cycle? reduction of NADPH release of oxygen production of ATP reduction of $\mathrm{CO}_{2}$
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Solution

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The answer is the fourth one: reduction of \(\mathrm{CO}_{2}\).

Explanation for each option:

  1. Reduction of NADPH: Incorrect. NADPH is actually oxidized in the Calvin cycle, providing the reducing power needed for the reduction of \(\mathrm{CO}_{2}\).

  2. Release of oxygen: Incorrect. Oxygen is released during the light-dependent reactions of photosynthesis, not the Calvin cycle.

  3. Production of ATP: Incorrect. ATP is consumed, not produced, in the Calvin cycle. It is used to convert 3-phosphoglycerate into glyceraldehyde-3-phosphate.

  4. Reduction of \(\mathrm{CO}_{2}\): Correct. The Calvin cycle involves the reduction of \(\mathrm{CO}_{2}\) to form glucose and other carbohydrates.

Summary: The Calvin cycle is primarily responsible for the reduction of \(\mathrm{CO}_{2}\) to synthesize carbohydrates, using ATP and NADPH produced in the light-dependent reactions.

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