M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:

The peptide bond in proteins is difficult to break using chemical methods under physiological conditions. Proteases are often used to increase the rate of hydrolized product formation. These enzymes serve which of the following functions?

I. Decrease the activation energy of the reaction
II. Drive the equilibirum of the reaction towards the products
III. Raise the pKa of the protein to make it more reactive

A

I only

B

I and II only

C

II only

D

I and III only