Final answer:
Temperature affects the activity of catalase in a biphasic manner. Initially, as the temperature increases, the reaction rate of catalase also increases. However, beyond a certain temperature, the activity of catalase starts to decrease due to enzyme denaturation.
Step-by-step explanation:
Temperature affects the activity of catalase in a biphasic manner. Initially, as the temperature increases, the reaction rate of catalase also increases due to the higher kinetic energy of the molecules. However, beyond a certain temperature, typically around the body temperature, the activity of catalase starts to decrease. This is because the high temperature can denature the enzyme, causing it to lose its structure and function.