Which of the Following Characteristics Is Most Likely to Be

Multiple Choice

Which of the following characteristics is most likely to be associated with an enzyme that catalyses two different chemical reactions?

A) The enzyme contains α-helices and β-pleated sheets.
B) The enzyme is subject to competitive inhibition and allosteric regulation.
C) The enzyme is composed of at least two subunits.
D) Either the enzyme has two distinct active sites or the substrates involved in the two reactions have very similar structures.