A) RuBP carboxylase
B) hydrogenase
C) PEP carboxylase
D) reductase
Correct Answer: C
Solution :
In \[{{C}_{4}}\] plants, initial fixation of \[C{{O}_{2}}\] takes place in the mesophyll cells. The primary acceptor of \[C{{O}_{2}}\] is phosphoenol pyruvate (=PEP) which combines with \[C{{O}_{2}}\] in the presence of PEP carboxylase to form oxaloacetic acid. RuBP carboxylase is the primary \[C{{O}_{2}}\] acceptor in \[{{C}_{3}}\] plants. Hydrogenase enzyme is common in micro organisms. It takes up or evolves gaseous \[{{O}_{2}}\]. Reductase or dehydrogenase enzyme catalyzes the dehydrogenation or removal of hydrogen atoms (or electrons).
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