Which of the given statements is correct about the C₄ plants ?

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RuBP is the primary CO₂ acceptor

RuBisCo is present in bundle sheath chloroplasts

PEP carboxylase enzyme is present in bundle sheath chloroplasts

PEP carboxylase catalyzes the carboxylation of RuBP to form oxaloacetate

answer is C.

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Detailed Solution

NCERT XI PAGE 219.

RuBisCo is present in bundle sheath chloroplasts.

C4 plants are special: They have a special type of leaf anatomy,‘Kranz’ anatomy.

The particularly large cells around the vascular bundles of the C4 plants are called bundle sheath cells,The bundle sheath cells may form several layers around the vascular bundles; they are characterised by having a large number of chloroplasts, thick walls impervious to gaseous exchange and no intercellular spaces.

The primary CO2 acceptor is a 3-carbon molecule phosphoenol pyruvate (PEP) and is present in the mesophyll cells. The enzyme responsible for this fixation is PEP carboxylase or PEPcase. It is important to register that the mesophyll cells lack RuBisCO enzyme,instead it is present in the bundle sheath cells.

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