Quiz on Enzymes and Metabolism

What is the role of active sites in enzymes?

• Interpreting in terms of three-dimensional structure

• Interpreting in terms of two-dimensional structure

• Interpreting in terms of one-dimensional structure

• No interpretation needed

What happens to bonds in the substrate during enzyme reactions?

• They are weakened

• They are strengthened

• They remain unchanged

• They are doubled

What is the term used to describe the permanent change in an enzyme's structure due to high temperatures?

• Dehydration

• Denaturation

• Decomposition

• Deactivation

What is the main benefit of using immobilised enzymes in industrial processes?

• Increasing enzyme concentration

• Allowing enzyme reuse and improving stability

• Reducing production costs

• Enhancing enzyme activity

What is the effect of high temperatures on enzyme activity?

• It enhances enzyme activity

• It causes denaturation

• It has no effect

• It stabilizes enzyme structure

What is the role of phenolphthalein in the experiment?

• It acts as a catalyst.

• It indicates the pH change.

• It provides nutrients for the reaction.

• It stabilizes the temperature.

What is the purpose of adding sodium carbonate solution in the experiment?

• To neutralize the solution

• To maintain alkalinity

• To provide nutrients

• To act as a catalyst

How much anhydrous solid is needed to make a 0.05M sodium carbonate solution?

• 5.2 g

• 10.4 g

• 14.2 g

• 20.8 g

What is the substrate in the enzyme-catalyzed reaction described?

• Water

• Oxygen

• Hydrogen peroxide

• Glucose

What is the final step in the method described for the experiment?

• Measure the time for the disc to float.

• Remove the disc using forceps and discard.

• Add more hydrogen peroxide.

• Grind more potato cylinders.