Answer :
During the process of carbon fixation in photosynthesis, several compounds are involved. Carbon fixation is part of the Calvin cycle, where carbon dioxide is incorporated into an organic molecule.
Here's a detailed explanation of the options provided:
1. OPGA (3-Phosphoglycerate):
- Carbon fixation leads to the production of 3-phosphoglycerate (3-PGA), which is the first stable intermediate formed in the Calvin cycle.
2. G3P (Glyceraldehyde 3-phosphate):
- G3P is generated later in the Calvin cycle and is not the immediate product of carbon fixation. It is eventually produced from further processing of 3-PGA.
3. RuBP (Ribulose bisphosphate):
- RuBP is the molecule that reacts with carbon dioxide to start the carbon fixation process but is not the product of the reaction.
4. C6H12O6 (Glucose):
- Glucose is produced after several rounds and additional reactions involving the Calvin cycle products but not directly during the carbon fixation step.
Therefore, the compound produced during the initial carbon fixation is 3-Phosphoglycerate (3-PGA). So, the correct answer is "OPGA."
Here's a detailed explanation of the options provided:
1. OPGA (3-Phosphoglycerate):
- Carbon fixation leads to the production of 3-phosphoglycerate (3-PGA), which is the first stable intermediate formed in the Calvin cycle.
2. G3P (Glyceraldehyde 3-phosphate):
- G3P is generated later in the Calvin cycle and is not the immediate product of carbon fixation. It is eventually produced from further processing of 3-PGA.
3. RuBP (Ribulose bisphosphate):
- RuBP is the molecule that reacts with carbon dioxide to start the carbon fixation process but is not the product of the reaction.
4. C6H12O6 (Glucose):
- Glucose is produced after several rounds and additional reactions involving the Calvin cycle products but not directly during the carbon fixation step.
Therefore, the compound produced during the initial carbon fixation is 3-Phosphoglycerate (3-PGA). So, the correct answer is "OPGA."