Q: What can be used to accelerate the rate at which chemical reactions occur?


Read this paragraph and choose the correct option from the provided answers:

Enzymes increase the rate of chemical reactions by reducing the amount of activation energy needed for reactants to start reacting. One way this can happen is modeled in the Figure below . Enzymes aren’t changed or used up in the reactions they catalyze, so they can be used to speed up the same reaction over and over again. Each enzyme is highly specific for the particular reaction is catalyzes, so enzymes are very effective. A reaction that would take many years to occur without its enzyme might occur in a split second with the enzyme. Enzymes are also very efficient, so waste products rarely form.

 Choices:

- hormones

- protein

- components

- enzymes


A:
enzymes