Rubisco Has 16 Subunits Joined Together to Make a Functional

Multiple Choice

Rubisco has 16 subunits joined together to make a functional unit. Eight of the subunits are large, the other eight are small. What is the function of the small subunits?

A) The small subunits contain the reactant binding sites.
B) They stabilize the overall enzyme's structure but have no intrinsic function.
C) The function of the small subunits is still unknown.
D) They regulate the enzyme's rate of catalysis.
E) The small subunits contain allosteric regulator binding sites.