Answer :
Final answer:
The compound produced during carbon fixation in the Calvin cycle is 3-PGA (3-phosphoglycerate). This occurs when carbon dioxide is fixed to ribulose bisphosphate (RuBP) through the action of the enzyme Rubisco. This step is crucial for the production of carbohydrates during photosynthesis.
Explanation:
Carbon Fixation in the Calvin Cycle
During the process of carbon fixation, carbon dioxide (CO2) is incorporated into an organic molecule. This process occurs in the Calvin cycle, where the first stable product formed is 3-phosphoglycerate (3-PGA), not G3P or RuBP. The key sequence in this cycle starts with RuBP (ribulose bisphosphate), which combines with CO2 under the enzyme Rubisco to produce 3-PGA.
- RuBP + CO2 → 3-PGA
- 3-PGA is then converted into G3P (glyceraldehyde 3-phosphate), which can then be used to form glucose and other carbohydrates.
In summary, the primary compound produced during the initial stage of carbon fixation is 3-PGA, which is critical to the overall functionality of the photosynthesis process.
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