Catalase and Hydrogen Peroxide: Exploring Enzymatic Reactions in a Classic Lab Activity

The video tutorial covers a lab experiment involving hydrogen peroxide and catalase. It explains the role of hydrogen peroxide as a reactant and catalase as an enzyme that breaks it down into water and oxygen, producing bubbles. The tutorial also discusses the use of hydrogen peroxide in everyday life and the body's defense mechanism involving catalase. Students are instructed to mix catalase with hydrogen peroxide and observe the reaction, with an option to use liver as a natural source of catalase. The video provides detailed lab instructions and equipment usage.

What is the role of hydrogen peroxide in the lab activity?

• It is used to measure temperature.

• It acts as a catalyst.

• It is the product of the reaction.

• It is the reactant and substrate.

What are the products when hydrogen peroxide is broken down by atomase?

• Methane and water

• Hydrogen and oxygen

• Water and oxygen

• Carbon dioxide and water

Why does hydrogen peroxide bubble when applied to wounds?

• It reacts with air.

• It releases carbon dioxide.

• Catalase in tissues breaks it down, releasing oxygen.

• It evaporates quickly.

What is the purpose of catalase in the body?

• To denature proteins

• To produce hydrogen peroxide

• To create bubbles

• To break down hydrogen peroxide

What is the first step in the lab activity?

• Adding salt to the solution

• Mixing catalase with hydrogen peroxide

• Heating the hydrogen peroxide

• Mixing hydrogen peroxide with water

What happens to catalase when the liver is cooked?

• It becomes more active

• It denatures

• It multiplies

• It changes color

What is the role of the liver in the lab activity?

• It is a product

• It is a reactant

• It is a source of catalase

• It acts as a control

How much hydrogen peroxide should be used in the lab activity?

• 10 milliliters

• 20 milliliters

• 15 milliliters

• 5 milliliters

What is the purpose of varying the source of catalase in the lab?

• To increase the temperature

• To produce more bubbles

• To observe different reaction rates

• To change the color of the solution

What indicates that the reaction between catalase and hydrogen peroxide is occurring?

• Change in color

• Formation of bubbles

• Increase in temperature

• Decrease in volume