AP Biology - Unit 3 Quiz 1

Where does a substrate bind to an enzyme?

• Active site

• Allosteric site

What happens to the reaction rate if an enzyme is denatured or nonfunctional?

• No change in the reaction rate

• Increase in reaction rate

• Decrease in reaction rate

• Decrease then increase in reaction rate

What is the function of an enzyme?

• To speed up a chemical reaction

• To provide additional energy

• To inhibit a cellular process

• To increase absorption of a molecule

Tags

NGSS.HS-LS2-5

How does a noncompetitive inhibitor decrease reaction rates?

• Binds to the active site

• Binds to the allosteric site

• Increases the free energy

• Increases the substrate concentration

Tags

NGSS.HS-PS1-2

What type of macromolecule are enzymes?

• Protein
• Carbohydrate
• Lipid
• Nucleic Acid

Tags

NGSS.HS-LS1-1

Which of the following correctly describes how enzymes work?  

• they lower the energy of the reactants to increase the rxn rate
• they supply energy to the reaction to increase the rxn rate
• they lower the energy of the products to increase the rxn rate
• they lower the activation energy of the reaction to increase the rxn rate

This type of inhibition blocks the active site of an enzyme:

• competitive inhibition

• allosteric inhibition

• noncompetitive inhibition

_____ is defined as the ability to do work.

• Enzyme

• Energy

• Work

• Inhibition

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

Zinc and Iron (metals)

• Coenzymes
• Cofactors
• Organic

Which type of allosteric regulation involves the substrate binding to one active site, which keeps the remaining active sites open?

• Feedback inhibition

• Allosteric activation

• Allosteric inhibition

• Cooperativity