Question

Which sentence best explains how enzymes speed up a chemical reaction?

Enzymes are not changed as a result of a chemical reaction.

Enzymes add heat to a chemical reaction.

Enzymes remove heat from a chemical reaction.

Enzymes lower the activation energy of a chemical reaction.

Answer 1

Enzymes lower the activation energy of a chemical reaction.

Answer 2

Enzymes are catalysts, meaning stuffs in charge of increasing the rate of chemical or biochemical reactions, they do it so by lowering the energy needed to start chemical reactions, this energy is called "activation energy"; Thereby the best suitable answer is the last one (4th).

Step-by-step explanation: