Enzyme Activity and Inhibition Quiz

What is the primary role of enzymes in biochemical reactions?

• To lower the activation energy

• To act as a reactant

• To increase the activation energy

• To be consumed in the reaction

Which factor does NOT affect enzyme activity?

• Temperature

• pH levels

• Substrate concentration

• Color of the enzyme

What happens to an enzyme if the pH is too high or too low?

• It multiplies

• It changes color

• It denatures

• It becomes more active

What is the inactive protein portion of an enzyme called?

• Coenzyme

• Cofactor

• Holoenzyme

• Apoenzyme

Which of the following is an organic molecule that helps activate an enzyme?

• Cofactor

• Coenzyme

• Apoenzyme

• Substrate

What type of inhibitor binds to the active site of an enzyme?

• Noncompetitive inhibitor

• Allosteric inhibitor

• Competitive inhibitor

• Feedback inhibitor

Where does a noncompetitive inhibitor bind on an enzyme?

• Substrate site

• Allosteric site

• Active site

• Cofactor site

What effect does an allosteric activator have on an enzyme?

• Denatures the enzyme

• Increases enzyme activity

• Decreases enzyme activity

• Blocks the substrate

What is feedback inhibition also known as?

• Neutral feedback

• Enzyme activation

• Negative feedback

• Positive feedback

In feedback inhibition, what role do end products play?

• They are converted into cofactors

• They increase enzyme production

• They become allosteric inhibitors

• They act as substrates