Assertion :In $c_{4}$ Plants, the bundle sheath cells are rich in an enzyme phosphoenol pyruvate carboxylase (PEP case) Reason: In $C_{4}$ plants, the mesophyll cells are rich in an enzyme Rbulose carboxylase-oxygenase (RuBisCO).

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
The primary $C O_{2}$ acceptor in $C_{4}$ cycle is a 3-carbon molecule phosphoenol pyruate (PEP ) present in the mesophyll cells. The enzyme responsible for this fixation is PEP carboxylase or PEPcase. The mesophyll cells lack RuBisCO enzyme. The $C_{4}$ acid OAA is formed in the mesophyll cells. The $C O_{2}$ released in the bundle sheath cells enters the $C_{3}$ or the calvin pathway, a pathway common to all plants. The bundle sheath cells are rich in an enzyme Ribulose bisphosphate carboxylase-oxygenase (RuBisCO), but lack PEPcase. So, the correct answer is 'Both Assertion and Reason are incorrect
SOLUTION'.

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Assertion :In c4 Plants, the bundle sheath cells are rich in an enzyme phosphoenol pyruvate carboxylase (PEP case) Reason: In C4 plants, the mesophyll cells are rich in an enzyme Rbulose carboxylase-oxygenase (RuBisCO).

Assertion :In $c_{4}$ Plants, the bundle sheath cells are rich in an enzyme phosphoenol pyruvate carboxylase (PEP case) Reason: In $C_{4}$ plants, the mesophyll cells are rich in an enzyme Rbulose carboxylase-oxygenase (RuBisCO).