Given below are two statements: I: the primary CO2 acceptor in C4 plants is phosphoenolpyruvate and is found in the Mesophyll cells. II: mesophyll cells of C4 plants lack RuBisCo enzyme. In the light of above statement, choose the correct option: (a) Both statement are incorrect (b) Statement I is correct but II is incorrect (c) Statement I is incorrect but II is correct (d) Both statements are correct
Option D Both statement are correct.Most of the plants that are adapted to dry tropical regions have the C4 pathway. These plants are called C4 plants. Sugarcane, Maize, Sorghum, Corn, etc. are the examples of these plants. In these plants, double fixation of carbon dioxide occurs by C4 pathway. The first CO2 acceptor is a three-carbon molecule phosphoenolpyruvate (PEP) and it is present in mesophyll cells. The enzyme that catalyzes this CO2 fixation is PEP carboxylase or PEPcase. The mesophyll cells of C4 plants lack the enzyme RuBisCO. The 4-carbon oxaloacetic acid (OAA) is formed in the mesophyll cells which is further converted into the malic acid or aspartic acid and then transported into bundle sheath cells. In the bundle sheath cells, these C4 acids are broken down to release CO2 and a three-carbon molecule.
