FreeMCATPrep Logo

More Than 475 Free MCAT Questions with Detailed Answers!

Click HERE for your Random Question from our MCAT Question A Day Archive

MCAT Question A Day - 8/8/13

Magnesium and calcium are essential to the proper functioning of numerous enzymes in a variety of reactions. The term that best describes their role is

A.  essential amino acids.
B.  coenzymes.
C.  cofactors.