Enzymes 2024

Multiple Choice

What are most enzymes made of?

• Lipids

• Proteins

• Carbohydrates

• Nucleic acids

Multiple Choice

What is the substance an enzyme acts on called?

• Catalyst

• Product

• Reactant

• Substrate

Multiple Choice

What is the place where an enzyme binds to the substrate called?

• Reaction site

• Active site

• Catalytic site

• Binding site

Multiple Choice

Which of the following is NOT a factor affecting enzyme activity?

• Light intensity

• Temperature

• pH

• Salt concentration

Multiple Choice

What happens to an enzyme if the temperature or pH is out of its normal range?

• It becomes a substrate

• It denatures

• It becomes more active

• It speeds up the reaction

Multiple Choice

What is the optimum pH for most enzymes?

• 2

• 6

• 7

• 9

Multiple Choice

What is the role of enzymes in biochemical reactions?

• They increase the activation energy

• They lower the activation energy

• They are consumed in the reaction

• They act as reactants

Multiple Choice

What is activation energy?

• Energy stored in products

• Energy stored in reactants

• Energy required to start a reaction

• Energy released during a reaction

Multiple Choice

How do enzymes affect activation energy?

• They raise it

• They lower it

• They eliminate it

• They do not affect it