Enzyme Action and Catalase Activity in the Breakdown of Hydrogen Peroxide

Dr. Knowlton introduces a lab on enzyme action, focusing on catalase and its role in breaking down hydrogen peroxide into water and oxygen. The video covers the setup and execution of the experiment, highlighting the materials needed and the steps to follow. It also addresses common mistakes students make and guides on data analysis and drawing conclusions from the results.

What is the primary role of an enzyme in a chemical reaction?

• To increase the activation energy

• To slow down the reaction

• To speed up the reaction by lowering activation energy

• To permanently change the substrate

In the lock and key model, what does the substrate represent?

• The lock

• The reaction

• The key

• The enzyme

What is the purpose of using hydrogen peroxide in the lab experiment?

• To measure the production of water

• To act as a catalyst

• To change the pH of the solution

• To observe the breakdown into water and oxygen

Why is it important to mix the catalase before using it in the experiment?

• To activate it

• To ensure it is homogenous

• To increase its concentration

• To change its color

What is the function of the graduated cylinder in the experiment setup?

• To act as a reaction chamber

• To collect and measure the displaced water

• To hold the hydrogen peroxide

• To measure the amount of catalase

Which of the following is a common mistake made during the experiment?

• Forgetting to mix the water bath

• Using a wrong type of tubing

• Not using a timer

• Adding too much hydrogen peroxide

What should be done every 30 seconds during the experiment?

• Change the reaction chamber

• Record the water displacement

• Check the temperature

• Add more catalase

What is the independent variable in the experiment's graph?

• pH level

• Amount of catalase

• Time

• Water displacement

What is the dependent variable in the experiment's graph?

• Time

• Temperature

• Water displacement

• Amount of substrate

What should be done after collecting data from the experiment?

• Repeat the experiment

• Change the experiment setup

• Discard the data

• Graph the data and analyze results