Which of the following is true of an enzyme? (mark all that apply )

a. it is a protein
b. it is a catalyst
c. it binds to many different substances
d. it is small compered to its substrates

a.it is a protein  

b.it is a catalyst

Explanation:

Enzymes are the biocatalyst that function to accelerate the rate of chemical reactions in the cells. Enzymes speed up the rate of reactions by lowering down the requirement of activation energy. As a catalyst, enzymes are never used up in the reactions. Enzymes are protein in nature, that is, enzymes are the proteins with catalytic activity.

geographic isolation