Which of the following statements about enzymes is not true.?

A. enzymes are consumed during chemical reactions

B. Enzymes decreases the free energy of activation of specific reactons

C. Enzymes increase chemical reaction rates

D. Enzymes have unique pH and temperature optima

Statetment A is the one which is not true. The enzymes are not consumed during reactions

Explanation:

Its function is to accelerate chemical reactions without modifying, which means that it can be used, again and again.

Enzymes always accelerate the reaction until equilibrium is reached and can be so efficient that the speed of the reaction is faster without the presence of the catalyst. They are specific since they always act on a certain substrate. Beyond the optimum temperatures and the pH the enzyme may not work, it becomes denatured since it loses the spatial structure and with it its function.