Animals Have Enzymes That Break Apart Starch Molecules but Not

Multiple Choice

Animals have enzymes that break apart starch molecules but not cellulose, despite the fact that both are made up of glucose subunits. Which enzyme characteristic best explains this?

A) Enzyme activity is regulated.
B) Enzymes are highly specific.
C) All enzymes are proteins.
D) Enzymes usually speed up chemical reactions.
E) Enzymes are not permanently changed by the reactions they promote.