The following flowchart depicts the steps of the Calvin Cycle. Which option, according to you, fits in as the correct answer to the missing step?
Correct answer: C. Ribulose bisphosphate
- A. Pyruvate
- B. Hydrogenase
- C. Ribulose bisphosphate
- D. Oxaloacetate
Explanation
The first step involves the fixing of carbon (derived from CO2) into molecules of Ribulose Bisphosphate (RuBP) via the action of the enzyme 'rubisco', resulting in the formation of 3-phosphoglycerate. This is further processed into 1,3-BPG and eventually, G-3-P, before the cycle starts again. The chart above only has RuBP missing.
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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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