Which of the following would differ if you compared the same reaction taking place with and without an enzyme a. the chemical energy of the reactants
b. the chemical change of the product
c. the energy required to the reaction

The correct answer is - option C.

Explanation:

Chemical energy is the energy that every substance or chemical have and its not affected by the presence or absence of the enzyme, while the activation energy is the required energy to initiate for a chemical reaction. If the energy of the chemical reaction is less than the activation energy reaction will not take place.

Presence of a enzyme lowers the amount of the energy for the initiating the reaction which is activation energy and the chemical reaction takes place.

Thus, the correct answer is - option C.