Enzymes

Multiple Choice

Which of the following factors can affect enzyme activity in biological organisms?

• pH

• Temperature

• Concentration

• All of the above

Open Ended

Why is it important to understand how enzymes react under different environmental conditions such as pH, temperature, and concentration?

Open Ended

Explain what happens to chemical bonds during chemical reactions and how energy changes affect whether a chemical reaction will occur.

Multiple Choice

Molecule X is most likely what type of compound?

• carbohydrate

• lipid

• nucleic acid

• protein

Multiple Choice

Which of the following best explains why the rate of cellular respiration decreases quickly at temperatures higher than 40°C?

• Enzymes that perform cellular respiration denature.

• Glucose becomes much less soluble in the blood.

• Mitochondria transition to the anaerobic respiration process.

• Perspiration interferes with the cells’ ability to metabolize lipids.

Open Ended

What causes the cracker to dissolve in your mouth?

Open Ended

What happens to the cracker after you let it sit in your mouth?

Open Ended

Describe how the toothpick enzyme activity models the function of enzymes in biological reactions.

Multiple Choice

At what temperature is the enzyme producing the most product, according to the graph?

• 10°C

• 26°C

• 34°C

• 40°C

Multiple Choice

Which of the following best describes the main function of enzymes?

• They increase the rate of chemical reactions.

• They provide energy for reactions.

• They are used up in reactions.

• They decrease the rate of reactions.

Open Ended

Explain why enzymes are considered very specific in their action. Use examples if possible.

Multiple Select

Which of the following statements about enzymes are correct?

• Enzymes are proteins.

• Enzymes are very specific.

• One enzyme can have many functions.

• The substance that an enzyme changes is called a substrate.

Multiple Choice

Which of the following statements about enzymes is correct?

• Each chemical reaction requires a specific enzyme.

• Enzymes can only be used once.

• Enzymes are made of carbohydrates.

• Enzymes can cause any reaction.

Multiple Select

Which of the following are types of enzyme reactions?

• Digestion

• Synthesis

• Fermentation

• Photosynthesis

Open Ended

Explain how the structure of an enzyme relates to its function, using the lock and key analogy.

Open Ended

Based on the diagram, what is the relationship between digestion, synthesis, and building blocks in cells?

Multiple Choice

What is the main function of an enzyme in a biochemical reaction as shown in the diagram?

• To speed up the reaction by lowering activation energy

• To act as a substrate

• To provide energy for the reaction

• To become part of the product

Multiple Choice

When does the actual reaction occur in an enzyme-catalyzed process?

• When the substrate binds to the enzyme

• When the substrate is released

• When the enzyme is denatured

• When the product leaves the enzyme

Open Ended

Explain the importance of the enzyme-substrate complex in the process of enzyme action.

Multiple Select

Which of the following are correct examples of enzyme and substrate pairs?

• Lactase - lactose

• Polymerase - polymers

• Glucase - glucose

• Maltase - maltose

Open Ended

Describe two factors that can influence enzyme action and explain how they affect the enzyme's activity.

Multiple Choice

Which of the following factors can influence the rate of enzyme-catalyzed reactions in biological systems?

• pH

• Temperature

• Concentration of enzyme or substrate

• All of the above

Open Ended

How do changes in environmental conditions such as pH, temperature, and concentration affect enzyme activity and the rate of chemical reactions in biological organisms?