Select the correct statement regarding the first stable product formed in Hatch and Slack pathway in $C_{4}$ plants.

Oxalocetate is formed by carboxylation of phosphoenol pyruvate (PEP) in the bundle sheath cells.

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Oxaloacetate is formed by carboxylation of phosphoenol pyruvate (PEP) in the mesophyll cells.

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Phosphoglyceric acid is formed in the mesophyll cells.

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Phosphoglyceric acid is formed in the bundle sheath cells.

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Solution

The correct option is B Oxaloacetate is formed by carboxylation of phosphoenol pyruvate (PEP) in the mesophyll cells.
In $C_{4}$ plants the first stable compound is formed in the mesophyll cells that form a ring around the bundle sheath. $C O_{2}$ here, is first accepted by PhosphoenolPyruvate to form the stable compound OxaloAcetate(OAA), which is then transported to the bundle sheath cells where it is decarboxylated and is fixed through the $C_{3}$ cycle.
So, the correct answer is 'Oxaloacetate is formed by carboxylation of phosphoenol pyruvate (PEP) in the mesophyll cells'

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