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
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 $\mathrm{CO}_{2}$
Solution
The answer is the fourth one: reduction of \(\mathrm{CO}_{2}\).
Explanation for each option:
Reduction of NADPH: Incorrect. NADPH is actually oxidized in the Calvin cycle, providing the reducing power needed for the reduction of \(\mathrm{CO}_{2}\).
Release of oxygen: Incorrect. Oxygen is released during the light-dependent reactions of photosynthesis, not the Calvin cycle.
Production of ATP: Incorrect. ATP is consumed, not produced, in the Calvin cycle. It is used to convert 3-phosphoglycerate into glyceraldehyde-3-phosphate.
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.