Answer:
An enzyme is a protein molecule that can catalyze the chemical reaction in living organism or any system. It increases the rate of the chemical reaction by lowering the energy of activation which is required to reach threshold to initiate the reaction.
Active site is the surface region of an enzyme which is specific to substrate and bind to its substrate to catalyse the reaction and remain unchanged after the product formation in the reaction.
When the temperature increase the rate of reaction and catalytic activity increases as well but after a limit it can denature the 3D structure of the protein as hydrogen bonds breaks in the process which leads to losing its biological properties. When the temeprature decreases the rate of catalyse activity decreases.
Explanation: i looked it up and i hope this helped