Enzymes (video)

What do pepsin and trypsin break down?

• Carbohydrates

• Lipids

• Proteins

• Nucleic acids

What is the purpose of cofactors and coenzymes in enzymes?

• To help the enzyme bond with the substrate

• To prevent the enzyme from bonding with the substrate

• To change the shape of the active site

• To remove the substrate from the active site

What are some examples of inorganic cofactors?

• Vitamins

• Zinc and iron

• DNA polymerase

• Allosteric sites

What is the difference between competitive and noncompetitive inhibitors?

• Competitive inhibitors bind to the allosteric site, while noncompetitive inhibitors sit in the active site.

• Competitive inhibitors sit in the active site, while noncompetitive inhibitors bind to the allosteric site.

• Competitive inhibitors help the enzyme bond with the substrate, while noncompetitive inhibitors prevent the enzyme from bonding with the substrate.

• Competitive inhibitors are permanent, while noncompetitive inhibitors are temporary.

How do ACE inhibitors work to lower blood pressure?

• By blocking angiotensin-converting enzymes.

• By converting angiotensin to angiotensin II.

• By raising blood pressure.

• By building the cell wall of bacteria.

What do nucleases break down?

• Carbohydrates

• Lipids

• Proteins

• Nucleic acids

What is a competitive inhibitor?

• A substance that binds to the active site of an enzyme

• A substance that binds to some other area of the enzyme

• A substance that helps enzymes work

• A substance that breaks down enzymes

Which enzyme breaks down carbohydrates?

• Pepsin
• Lipase
• Amylase
• Nuclease

Where do noncompetitive inhibitors bind?

• Cofactor site
• Enzyme substrate complex
• Allosteric site
• Active site

How does penicillin work?

• Inhibiting enzyme activity
• Inhibiting protein synthesis
• Inhibiting cell wall formation
• Inhibiting DNA replication