Enzyme-Catalyzed Reactions Quiz

What is the substrate mentioned in the enzyme-catalyzed reaction?

• Sucrose

• Lactose

• Maltose

• Cellulose

What happens when the substrate binds to the active site of the enzyme?

• An enzyme-substrate complex is formed.

• The enzyme is deactivated.

• The substrate is destroyed.

• The enzyme changes shape permanently.

What is released after the enzyme catalyzes the reaction?

• Glucose and fructose

• Water and oxygen

• Carbon dioxide and water

• Lactose and maltose

What is the role of an enzyme as a catalyst?

• It accelerates the rate of chemical reactions.

• It is permanently changed by the reaction.

• It is consumed by the reaction it catalyzes.

• It is a carbohydrate molecule.

Why do cells require enzymes?

• To slow down chemical reactions.

• To increase activation energy.

• To enable rapid chemical reactions.

• To decrease the rate of reactions.

What is the active site of an enzyme responsible for?

• Storing energy.

• Catalyzing a chemical reaction.

• Transporting molecules.

• Breaking down enzymes.

How do cells regulate enzyme activity?

• By increasing temperature.

• Through competitive inhibition.

• By changing pH levels.

• By altering enzyme structure.

What do some enzymes require to function properly?

• Carbohydrates.

• Lipids.

• Cofactors like minerals and vitamins.

• Sugars.

Approximately how many chemical reactions may occur in a eukaryotic cell?

• 100,000

• 1 million

• 10 million

• 100 million

What role do enzymes play in chemical reactions within a eukaryotic cell?

• They slow down reactions.

• They prevent reactions from occurring.

• They enable reactions to occur in the proper location and time.

• They destroy the products of reactions.