Question

A substance that speeds up the rate of a chemical reaction is called

A. a catalyst

B. a substrate.

C. an enzyme.

D. Both A and C

Answer 1

That would be both A and C

Answer 2

Enzyme is a catalyst.
Catalysts increase the rate of the reaction by reducing the activation energy without being consumed :)

Answer 3

@DarrenMadx did u get it ?

Answer 4

yeah thanks