Enzymology Quiz

What is the definition of an apoenzyme?

• A reactant in a catalyzed reaction

• A substance that diminishes the rate of a chemical reaction

• An effector molecule that increases the catalytic activity of an enzyme

• The protein part of an enzyme without the cofactor necessary for catalysis

What is the function of an activator in enzymology?

• Catalyzes the conversion of one micromole of substrate per minute

• Forms an active compound called a holoenzyme

• Increases the catalytic activity of an enzyme when it binds to a specific site

• Binds with regulatory molecules in the allosteric site

What is the property of a catalyst that is measured by the catalyzed rate of conversion of a specified chemical reaction?

• Isoenzyme

• Enzyme

• Coenzyme

• Catalytic Activity

What are isoenzymes in enzymology?

• Group of related enzymes catalyzing the same reaction but having different molecular structures

• Substances produced by the enzyme-catalyzed conversion of a substrate

• Reactants in a catalyzed reaction

• Protein molecules that catalyze chemical reactions without being destroyed

What is the International Unit in enzymology?

• Amount of enzyme that catalyzes the conversion of one micromole of substrate per minute under specified conditions

• Specific portion of enzyme that binds on the substrate

• Property of a catalyst that is measured by the catalyzed rate of conversion of a specified chemical reaction

• A cavity other than the active site which may bind with regulatory molecules

What is the function of the allosteric site in an enzyme?

• Binds with regulatory molecules

• Increases the catalytic activity of an enzyme when it binds to a specific site

• Forms an active compound called a holoenzyme

• Catalyzes the conversion of one micromole of substrate per minute

According to Emil Fisher's/Lock & Key Theory, what must fit into the lock (enzyme)?

• The substrate

• The coenzyme

• The activator

• The shape of the key (substrate)

What is the basis of Kochland/Induced Fit Theory?

• Enzyme have a rigid active site

• The substrate binding to the active site of the enzyme

• Enzyme has a flexible active site

• The shape of the key (substrate) must fit into the lock (enzyme)

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

• Increases the catalytic activity of an enzyme when it binds to a specific site

• Binds with regulatory molecules

• A cavity other than the active site which may bind with regulatory molecules

• Specific portion of enzyme that binds on the substrate

What is the definition of a coenzyme in enzymology?

• LMW diffusible, heat-stable substance that forms an active compound called a holoenzyme

• Protein part of an enzyme without the cofactor necessary for catalysis

• Substance that diminishes the rate of a chemical reaction

• Reactant in a catalyzed reaction