AP BIO: UNIT 3 ENZYMES QUICK CHECK

What is a catalyst?

• A substance that slows down a chemical reaction

• A chemical agent that speeds up a reaction without being consumed

• A reactant in a chemical reaction

• A product of a chemical reaction

What is the role of enzymes in chemical reactions?

• They are consumed by the reaction

• They function as catalysts

• They increase the activation energy

• They act as substrates

What is the initial energy needed to start a chemical reaction called?

• Kinetic energy

• Potential energy

• Activation energy

• Thermal energy

How do enzymes speed up chemical reactions?

• By increasing the temperature

• By lowering the activation energy

• By increasing the pressure

• By adding more reactants

What is the specific reactant that an enzyme acts on called?

• Product

• Substrate

• Inhibitor

• Cofactor

Where does the substrate bind on an enzyme?

• Inhibitor site

• Active site

• Cofactor site

• Product site

What is formed when an enzyme and substrate bind together?

• Enzyme-product complex

• Enzyme-substrate complex

• Substrate-inhibitor complex

• Product-cofactor complex

What are cofactors?

• Protein enzyme helpers

• Non-protein enzyme helpers

• Enzyme inhibitors

• Enzyme substrates

What type of inhibitor competes with the substrate for the active site?

• Noncompetitive inhibitor

• Competitive inhibitor

• Cofactor

• Substrate

What effect does a noncompetitive inhibitor have on an enzyme?

• It competes with the substrate for the active site

• It binds to another part of the enzyme, changing its shape

• It increases the enzyme's activity

• It acts as a substrate