Which of the following cells in ${\mathrm{C}}_4$ plants are rich in RuBisCO?

 

C₄ plants have kranz anatomy in which the total process of photosynthesis involves two types of cells. The mesophyll cells lack the RuBisCO enzyme. In the place of RuBisCO, it has a 3-carbon molecule phosphoenol pyruvate (PEP) as the primary CO₂ acceptor.

The enzyme responsible for this fixation is PEP carboxylase or PEPcase. It is important to register that the CO₂ released in the bundle sheath cells enters the C₃ or the Calvin pathway, a pathway common to all plants. The bundle sheath cells are rich in the enzyme Ribulose bisphosphate carboxylase-oxygenase (RuBisCO), but lack the PEP case enzyme.