Answer :
During the process of carbon fixation in photosynthesis, carbon dioxide (CO₂) is incorporated into an organic compound. This happens in the Calvin cycle, which is a series of biochemical reactions that occur in the stroma of chloroplasts in photosynthetic organisms.
Here is a step-by-step explanation of what happens during carbon fixation:
1. Start with CO₂: Carbon dioxide enters the plant cell and is absorbed in the chloroplast.
2. Reaction with RuBP: The CO₂ is then fixed by binding with a five-carbon sugar called ribulose bisphosphate (RuBP). This reaction is catalyzed by the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase, commonly known as RuBisCO.
3. Formation of a 6-Carbon Intermediate: The combination of CO₂ with RuBP creates an unstable six-carbon intermediate that quickly splits into two molecules.
4. Production of 3-Phosphoglycerate (PGA): Each six-carbon intermediate divides into two molecules of 3-phosphoglycerate (PGA), which is a three-carbon compound.
The answer is that the compound produced during carbon fixation is PGA (3-Phosphoglycerate). This is the first stable product in the Calvin cycle.
Here is a step-by-step explanation of what happens during carbon fixation:
1. Start with CO₂: Carbon dioxide enters the plant cell and is absorbed in the chloroplast.
2. Reaction with RuBP: The CO₂ is then fixed by binding with a five-carbon sugar called ribulose bisphosphate (RuBP). This reaction is catalyzed by the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase, commonly known as RuBisCO.
3. Formation of a 6-Carbon Intermediate: The combination of CO₂ with RuBP creates an unstable six-carbon intermediate that quickly splits into two molecules.
4. Production of 3-Phosphoglycerate (PGA): Each six-carbon intermediate divides into two molecules of 3-phosphoglycerate (PGA), which is a three-carbon compound.
The answer is that the compound produced during carbon fixation is PGA (3-Phosphoglycerate). This is the first stable product in the Calvin cycle.