Enzymes Quiz

What is the effect of pH on enzymes?

• All enzymes function optimally at a pH of 7.
• pH affects enzyme activity by altering their structure and function, with each enzyme having an optimal pH range.
• pH has no effect on enzyme activity.
• Enzymes are only affected by temperature, not pH.

How do enzymes affect the activation energy of a reaction?

• Enzymes lower the activation energy of a reaction.
• Enzymes increase the activation energy of a reaction.
• Enzymes only affect the rate of reaction, not the activation energy.
• Enzymes have no effect on the activation energy of a reaction.

Which model describes the relationship between an enzyme and its substrate?

• Substrate-level phosphorylation model
• Competitive inhibition model
• Induced fit model
• Lock and key model

What is the main function of enzymes in biological reactions?

• Enzymes are used to store energy in cells.
• The main function of enzymes is to catalyze biological reactions.
• Enzymes are responsible for transporting nutrients across membranes.
• Enzymes help in the formation of cellular structures.

What can alter enzyme activity?

• Light intensity
• Oxygen levels
• Enzyme concentration
• Temperature, pH, substrate concentration, inhibitors, and activators.

What is the active site of an enzyme?

• The active site is where the enzyme is produced.
• The active site is the enzyme's overall structure.
• The active site is the region where products are released.
• The active site of an enzyme is the region where substrate binding and catalysis occur.

What are substrates in relation to enzymes?

• Substrates are the enzymes that catalyze reactions.
• Substrates are the molecules upon which enzymes act.
• Substrates are the byproducts of enzyme activity.
• Substrates are the energy sources for enzymes.

Are enzymes specific to their substrates? Explain.

• Yes, enzymes are specific to their substrates.
• Enzymes do not interact with substrates at all.
• Enzymes are only specific to one type of reaction.
• Enzymes can work with any substrate.

What are enzymes and what role do they play in the body?

• Enzymes are carbohydrates that store energy in the body.
• Enzymes are proteins that catalyze biochemical reactions in the body, playing essential roles in processes like digestion and metabolism.
• Enzymes are minerals that strengthen bones and teeth.
• Enzymes are vitamins that help in the absorption of nutrients.

What are enzyme inhibitors?

• Enzyme inhibitors are proteins that speed up chemical reactions.
• Enzyme inhibitors are substances that reduce or prevent the activity of enzymes.
• Enzyme inhibitors are substances that enhance enzyme activity.
• Enzyme inhibitors are molecules that have no effect on enzymes.