What are the different stages of the Calvin cycle?
Correct answer: D. Carbon fixation,Reduction, and RUBP regeneration
- A. Carbon fixation
- B. RUBP regeneration
- C. Reduction
- D. Carbon fixation,Reduction, and RUBP regeneration
Explanation
The correct answer is Carbon fixation,Reduction,and RUBP regeneration. The Calvin cycle involves three crucial stages: Carbon fixation, where CO2 is attached to a 5-carbon sugar; Reduction, where ATP and NADPH are used to transform 3-phosphoglycerate into G3P; and RUBP regeneration, where the cycle's initial 5-carbon molecule is regenerated. Option A only mentions Carbon fixation, and Option C only mentions Reduction, making them incomplete. RUBP regeneration is essential for the cycle's continuity; thus, combining all these steps reflects the full cycle.
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Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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