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

Question

The enzyme is composed of at least two identical subunits.
The enzyme contains both α-helix and β-pleated sheet regions.
The enzyme has two distinct active sites.
The enzyme is subject to both competitive inhibition and allosteric regulation.

Answer 1

The characteristic that is most likely to be associated with an enzyme that catalyzes two different chemical reactions is:

The enzyme has two distinct active sites.

Enzymes that can catalyze more than one reaction often have different active sites that can accommodate different substrates or facilitate different reactions. This structural feature allows the enzyme to function in multiple roles, distinguishing it from enzymes that only catalyze a single reaction with a single active site.