AP Biology Lab 2: Enzyme Catalysis

The video tutorial provides a walkthrough of AP Biology Lab 2, focusing on enzyme catalysis. It explains the role of catalase in breaking down hydrogen peroxide into water and oxygen. The lab experiment involves using yeast to observe reaction rates by measuring how quickly filter paper floats in hydrogen peroxide. The tutorial also discusses factors affecting enzyme activity, such as temperature and pH, and how these influence reaction rates.

What is the primary function of catalase in living organisms?

• To synthesize proteins

• To break down hydrogen peroxide

• To transport oxygen in the blood

• To convert glucose into energy

Which of the following best describes an enzyme?

• A molecule that is consumed in a reaction

• A biological molecule that acts as a catalyst

• A product of a chemical reaction

• A reactant in a chemical reaction

In the lab experiment, what is the role of yeast catalase?

• To change the color of the solution

• To provide energy for the reaction

• To break down hydrogen peroxide

• To act as a substrate

How is the rate of reaction measured in the yeast catalase experiment?

• By counting the number of bubbles

• By measuring the time taken for filter paper to float

• By observing the color change

• By weighing the filter paper

What happens to enzyme activity when the substrate concentration is increased?

• It decreases immediately

• It remains constant

• It increases initially

• It stops completely

Why does enzyme activity decrease at high temperatures?

• The enzyme becomes more active

• The reaction becomes too fast

• The substrate concentration decreases

• The enzyme denatures and loses its shape

What is the effect of pH on enzyme activity?

• It has no effect

• It only affects enzymes in acidic environments

• It can denature the enzyme at extreme pH levels

• It only affects enzymes in basic environments