Question

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

a. a catalyst.
b. a lipid.
c. a molecule.
d. an element.

Answer 1

A substance that speeds up the rate of a chemical reaction is called a catalyst. As a catalyst speeds up the reaction, as an enzyme does.

Answer 2

I'm not going toblie I'm stuck with A and B. But to me my gut says A