AP Bio Insta-Review Topic 3.2: Enzyme Catalysis

Front

What is the primary function of an enzyme in a biochemical reaction?

Back

To increase the reaction rate.

Front

How do enzymes affect the Gibbs free energy change of a reaction?

Back

Enzymes do not change the Gibbs free energy change; it stays the same.

Front

What effect does lowering activation energy have on reaction rate?

Back

It increases the reaction rate.

Front

How does the presence of an enzyme affect the activation energy required for a reaction?

Back

It decreases the activation energy.

Front

What is activation energy?

Back

The minimum energy required for a chemical reaction to occur.

Front

What is the relationship between enzyme concentration and reaction rate?

Back

Increasing enzyme concentration generally increases the reaction rate, provided substrate is available.

Front

What is substrate specificity in enzymes?

Back

Enzymes are specific to their substrates, meaning each enzyme only catalyzes a specific reaction.

Front

What is the role of the active site in an enzyme?

Back

The active site is the region on the enzyme where substrate molecules bind and undergo a chemical reaction.

Front

What happens to an enzyme after it catalyzes a reaction?

Back

The enzyme is not consumed in the reaction and can be reused.

Front

What factors can affect enzyme activity?

Back

Temperature, pH, enzyme concentration, substrate concentration, and the presence of inhibitors or activators.