QUIZ 1. ENZYMOLOGY

What are enzymes?

• Proteins that act as catalysts in chemical reactions

• Fats that store energy

• DNA molecules responsible for genetic coding

• Hormones that regulate body processes

Which part of an enzyme binds to the substrate?

• Active site

• Coenzyme

• Allosteric site

• Inhibitor site

What happens to an enzyme after a chemical reaction?

• It gets consumed

• It becomes inactive permanently

• It remains unchanged and can be reused

• It breaks down into smaller molecules

Which of the following can denature an enzyme?

• Extreme pH levels

• Low substrate concentration

• Presence of coenzymes

• High product concentration

What is a coenzyme?

• A molecule that competes with the substrate

• A non-protein molecule that helps enzyme activity

• A region of the enzyme that binds inhibitors

• A product of an enzyme-catalyzed reaction

Enzyme activity is affected by all of the following EXCEPT:

• Temperature

• pH levels

• Substrate concentration

• Enzyme size

What is the function of an inhibitor?

• Increases the speed of enzyme reactions

• Prevents the substrate from binding to the enzyme

• Forms the active site of an enzyme

• Converts the enzyme into a coenzyme

What is the name for enzymes that break down proteins?

• Amylases

• Lipases

• Proteases

• Nucleases

What type of enzyme regulation involves a molecule binding to a site other than the active site?

• Competitive inhibition

• Non-competitive inhibition

• Substrate-level activation

• Feedback inhibition

What is the term for an inactive enzyme precursor?

• Apoenzyme

• Holoenzyme

• Zymogen

• Isoenzyme