Biochemistry Quiz

What is the function of an enzyme in a chemical reaction?

• To speed up the reaction

• To slow down the reaction

• To change the reactants

• To change the products

Why is the enzymes regulatory binding site important for controlling the activity of the enzyme?

• To decrease enzyme activity

• To increase enzyme activity

• To regulate enzyme function

• To bind with the substrate

Why are coenzymes (derived from vitamins) important to the function of some enzymes?

• To provide additional functional groups

• To increase enzyme concentration

• To change the enzyme structure

• To deactivate the enzyme

What happens to the enzymes when the body temperature rises from 37ᵒC to 42ᵒC?

• The enzymes become more active

• The enzymes denature and become non-functional

• The enzymes break down into smaller molecules

• The enzymes stop all reactions

Why is an enzymes active site important to the function of the enzyme?

• To regulate enzyme activity

• To bind with the coenzyme

• To store energy

• To determine enzyme specificity

Which type of inhibition involves a substance that competes with the substrate for binding to the active site of the enzyme?

• Allosteric inhibition

• Reversible competitive inhibition

• Irreversible inhibition

• Reversible non-competitive inhibition

What is the main function of ACE Inhibitors as mentioned in the text?

• Increase blood pressure

• Inhibit enzyme activity to lower blood pressure

• Activate enzyme activity to lower blood pressure

• Prevent enzyme production

Which enzyme is used in the treatment of myocardial infarction (MI) by dissolving blood clots?

• Glycogen synthase

• Lactate dehydrogenase

• Tissue plasminogen activator (TPA)

• Urease

What is the purpose of zymogens in the body?

• To release enzymes in an inactive form

• To activate enzymes

• To inhibit enzyme activity

• To transport enzymes

Which type of enzyme regulation involves the addition or removal of a group to or from the enzyme?

• Allosteric regulation

• Covalent modification

• Feedback control

• Isoenzyme regulation