Biology

Selena Lin

21 October, 14:15

For questions 4 and 5, refer to the passage below.

Many cells make and use an enzyme, called catalase,

to facilitate the decomposition of hydrogen peroxide

(H2O2). The products of the decomposition are

hydrogen (H2) and oxygen (O2).

4. What is the effect of catalase on the decomposition

of hydrogen peroxide?

A. It decreases the activation energy needed to

start the reaction.

B. It decreases the total energy released by

the reaction.

C. It increases the total energy absorbed by

the reaction.

D. It changes the ratio of the amounts of the

two products.