Question

directions: select the correct answers. choose the two actions that would increase the rate of reaction for the enzyme catalase. increasing the concentration of catalase increasing the concentration of the substrate, hydrogen peroxide increasing the amount of another enzyme, amylase increasing the temperature of the reaction within the optimal range for catalase increasing the catalase’s exposure to oxygen

Explanation:

1. Increasing the concentration of catalase: More enzyme molecules mean more active sites for substrate binding, increasing reaction rate (until substrate is limiting).
2. Increasing the concentration of the substrate (hydrogen peroxide): More substrate molecules increase the chance of colliding with enzyme active sites, boosting reaction rate (until enzyme is saturated).
3. Increasing amylase: Amylase acts on starch, not hydrogen peroxide (catalase’s substrate), so this has no effect.
4. Increasing temperature (optimal range): Within the enzyme’s optimal temperature, kinetic energy increases, leading to more frequent effective collisions between enzyme and substrate, increasing rate.
5. Increasing oxygen exposure: Catalase breaks down \( \ce{H_2O_2} \); oxygen is a product, not a factor affecting catalase’s reaction rate.

Answer:

• Increasing the concentration of catalase
• Increasing the concentration of the substrate, hydrogen peroxide
• Increasing the temperature of the reaction within the optimal range for catalase

(Note: The question asks for two actions, but three are correct. If strictly two, the most fundamental are increasing enzyme concentration, substrate concentration, or temperature in optimal range. Typically, "Increasing the concentration of catalase" and "Increasing the concentration of the substrate, hydrogen peroxide" are core choices, or either with temperature in optimal range.)