Answer :
Final answer:
During carbon fixation, the compound produced is 3-phosphoglycerate (3-PGA) after CO₂ reacts with RuBP. The Calvin Cycle subsequently transforms 3-PGA into G3P. Thus, 3-PGA is the immediate product of carbon fixation.
Explanation:
Carbon Fixation in the Calvin Cycle
During the process of carbon fixation, 3-phosphoglycerate (3-PGA) is produced. This occurs when carbon dioxide (CO2) combines with ribulose bisphosphate (RuBP) in a reaction catalyzed by an enzyme called RuBisCO. The initial outcome of this reaction is a six-carbon compound that quickly splits into two molecules of 3-PGA.
To summarize the key steps of the Calvin Cycle:
1. CO2 enters the cycle and reacts with RuBP.
2. This forms a six-carbon intermediate compound.
3. The six-carbon compound immediately breaks down into two molecules of 3-PGA.
In subsequent steps of the cycle, 3-PGA is then converted into glyceraldehyde-3-phosphate (G3P) with the help of ATP and NADPH generated during the light-dependent reactions of photosynthesis. Ultimately, G3P can be used to form glucose and other carbohydrates, making it an essential product of photosynthesis.
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