What is the primary function of the enzyme catalase?

• To synthesize hydrogen peroxide

• To break down hydrogen peroxide into water and oxygen

• To increase the pH of a solution

• To act as a reactant in cellular respiration

How does a catalyst, such as an enzyme, affect a chemical reaction?

• It is consumed during the reaction, becoming a product.

• It slows down the reaction rate.

• It speeds up the reaction rate without being consumed.

• It changes the type of products formed.

What causes the filter paper discs to float to the top of the hydrogen peroxide solution in the experiment?

• The filter paper absorbs the hydrogen peroxide, making it lighter.

• The yeast on the paper produces carbon dioxide, which makes it float.

• Oxygen gas produced by the breakdown of hydrogen peroxide attaches to the paper.

• The heat generated by the reaction causes the paper to rise.

What happens to an enzyme's activity if the temperature or pH deviates significantly from its optimal range?

• The enzyme's activity increases indefinitely.

• The enzyme's activity remains constant.

• The enzyme denatures, losing its specific three-dimensional shape and activity.

• The enzyme converts into a different type of enzyme.