Question

Why do we say that "an enzyme is reusable"?

Answer 1

enzymes are resuable as they are biologically catalyst which speeds up the rate of a reaction without being chemically changed themselves. However, if the enzyme is to be denatured under unfavourable conditions (extreme temperatures, extreme pH), the enzymes may not be reusable once denatured.

Answer 2

When an enzyme speeds up it doesnt change so it can be reused