What is activation energy?

• The energy released during a reaction

• The energy required to start a reaction

• The energy stored in products

• The energy lost as heat

How does an enzyme-catalyzed reaction differ from a non-catalyzed reaction?

• It requires more energy to start

• It requires less energy to start

• It produces different products

• It takes longer to complete

What happens to the enzyme after the reaction takes place?

• It is destroyed.

• It is used again.

• It becomes a product.

• It changes into a substrate.

How do enzymes affect the energy required for a chemical reaction?

• They increase the energy required.

• They have no effect on the energy required.

• They decrease the energy required.

• They double the energy required.

What happens to an enzyme when it is in an environment that is too hot?

• It becomes more active

• It denatures

• It freezes

• It changes shape permanently