Question

1. enzymes are catalysts that are able to speed up the rate of chemical reactions. how are enzymes able to do this? a. enzymes make the particles interacts more frequently. b. enzymes are able to increase the temperature of the reaction. c. enzymes lower the activation energy needed to carry out the reaction. d. enzymes increase the activation energy needed to carry out the reaction.

Explanation:

Enzymes function as biological catalysts by reducing the activation - energy barrier for a chemical reaction. Activation energy is the minimum amount of energy required for a reaction to occur. By lowering it, more reactant molecules can participate in the reaction, thus speeding up the reaction rate. They do not change the temperature of the reaction or increase the activation energy. Also, they do not directly make particles interact more frequently in the way described in option A.

Answer:

C. Enzymes lower the activation energy needed to carry out the reaction.