Correct option is B
The correct answer is: (B) Oxaloacetate
In C₄ plants, the first stable product of photosynthesis is oxaloacetate (OAA). C₄ plants follow a two-step carbon fixation process to efficiently capture CO₂ and minimize photorespiration.
Carbon fixation in mesophyll cells:
Phosphoenolpyruvate (PEP) acts as the primary CO₂ acceptor and reacts with CO₂.
This reaction is catalyzed by the enzyme PEP carboxylase, forming oxaloacetate (OAA) as the first stable product.
Information Booster :
First stable compound: Oxaloacetate (OAA)
Primary CO₂ acceptor: Phosphoenolpyruvate (PEP)
Enzyme used: PEP carboxylase
Site of initial fixation: Mesophyll cells
Advantage: Reduces photorespiration and increases CO₂ efficiency
Examples of C₄ plants: Maize, Sugarcane, Sorghum, Bajra.
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