Chapter 15- Enzymes

____ is a molecule that is structurally similar to the substrate for an enzyme.

• Competitive inhibitor

• Cofactor

• Regulator

• Noncompetitive inhibitor

Positive modulation ___ enzyme action and negative modulation ___ enzyme action.

• Stimulates, inhibits

• Inhibits, stimulates

• Both inhibit

• Both stimulate

To overcome competitive inhibition you can

• Increase pH

• Decrease the temperature

• Increase substrate concentration

If a patient has a very high fever, catalytic rate could be reduced due to

• Enzymes acting as inhibitors

• Proteins becoming partially or completely denatured

• Proteins undergoing hydrolysis

• Heat acting as a competitive inhibitor

Apoenzyme corresponds to what part of the enzyme?

• Coenzyme

• Protein portion

• Cofactor

What is the site on an enzyme where the substrate interacts?

• Regulatory site

• Modulator site

• Active site

• Allosteric site

What is an isozyme?

• They occur in different forms in different tissues, catalyzing the same reaction.

• Are always composed of one subunit.

• Unaffected at extreme temperatures.

• Must be modified by a kinase to become active.

Most enzymes are

• Globular

• Fibrous

Enzymes are named based on

• The name of who discovered them.

• The country where they were found.

• The reaction they catalyze/compound they act on.

• The first body part that came to mind when they were discovered.

Which group of enzymes does oxidoreductase belong to?

• Hydrolases

• Lyases

• Oxidoreductases

• Transferases