Question

RuBisCO is

• A. RuBP carboxylase
• B. RuBP oxygenase
• C. RuBP carboxylase-oxygenase
• D. RuBP carboxydismutase

Answer 1

Answer: (C)

The enzyme RuBisCO carries out photosynthetic carboxylation of RuBP. The enzyme was previously called as carboxydismutase. RuBisCO is the most abundant protein of the biological world. RuBisCO is located in the stroma on the outer surface of thylakoid membranes. As it is capable of carrying out both carboxylation and oxygenation reactions in $C_3$ and $C_4$ plants respectively, thus it is correctly named as RuBP carboxylase-oxygenase.