1
Question
The first carbon dioxide acceptor in C4 plants is
The first carbon dioxide acceptor in C4 plants is
Open in App
Solution
The correct option is A Phosphoenolpyruvate
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.
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.
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
