HL Enzymes Video

What is the primary difference between extracellular and intracellular enzymes?

• Extracellular enzymes are produced inside the cell and used inside the cell.

• Intracellular enzymes are produced on the rough ER and exported out of the cell.

• Extracellular enzymes are produced on the rough ER and exported out of the cell.

• Intracellular enzymes are produced on the rough ER and used outside the cell.

Why is heat considered a byproduct of cellular reactions?

• Because it is the main product of cellular respiration.

• Because it is stored for later use in the cell.

• Because it is lost and cannot be used for other processes.

• Because it is a usable form of energy for cellular processes.

Which of the following is an example of a linear metabolic pathway?

• Krebs cycle

• Calvin cycle

• Photosynthesis

• Glycolysis

What is the role of enzymes in metabolic pathways?

• To slow down reactions and conserve energy.

• To inhibit all cellular reactions.

• To convert heat into usable energy.

• To speed up and control reactions.

How does noncompetitive inhibition affect an enzyme's active site?

• It changes the shape of the active site, preventing substrate binding.

• It removes the active site from the enzyme.

• It competes with the substrate for the active site.

• It enhances the substrate's ability to bind to the active site.

What happens to the reaction rate when a competitive inhibitor is present?

• The reaction rate remains unchanged.

• The reaction rate decreases initially but can be reversed by increasing substrate concentration.

• The reaction rate decreases and cannot be reversed.

• The reaction rate increases immediately.

What is feedback inhibition?

• A process where the final product is converted back to the initial substrate.

• A process where the final product inhibits the first enzyme in a chain.

• A process where the final product enhances the first enzyme in a chain.

• A process where the first enzyme in a chain is permanently activated.

How does penicillin affect bacterial cells?

• It enhances the production of bacterial cell walls.

• It inhibits the enzyme that bacteria use to build their cell walls.

• It competes with bacterial enzymes for nutrients.

• It permanently activates bacterial enzymes.

Why are some inhibitors considered permanent?

• They enhance the enzyme's activity permanently.

• They cause a permanent change in the enzyme's structure.

• They cause a reversible change in the enzyme's structure.

• They temporarily bind to the active site.

What is the significance of penicillin being a noncompetitive inhibitor?

• It enhances bacterial enzyme activity.

• It permanently inhibits bacterial enzymes without affecting human cells.

• It competes with human enzymes for the active site.

• It temporarily inhibits bacterial enzymes.