Question

what are the effects of enzymes on chemical reactions? select all of the answers that apply.
a. enzymes increase the heat of reaction.
b. enzymes decrease the activation energy.
c. enzymes increase the rate of the reaction.

Explanation:

Enzymes are biological catalysts. Catalysts lower the activation energy ($E_a$) of a reaction. A lower $E_a$ means a faster reaction rate. The heat of reaction ($\Delta H$) is determined by the difference in energy between reactants and products and is not affected by enzymes.

Answer:

B. Enzymes decrease the activation energy.
C. Enzymes increase the rate of the reaction.