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When a catalyst is involved in the collision between the reactant molecules, less energy is required for the chemical change to take place, and hence more collisions have sufficient energy for reaction to occur. The reaction rate therefore increases.Collision theory is closely related to chemical kinetics.hen a catalyst is involved in the collision between the reactant molecules, less energy is required for the chemical change to take place, and hence more collisions have sufficient energy for reaction to occur. The reaction rate therefore increases. Collision theory is closely related to chemical kinetics.
B) substrate must bind to the active site before a reaction occurs. C) reaction occur at the active site, which usually consists of a crevice on the surface of the enzyme. D) an enzyme yields a specific product whereas a nonbiological catalyst may produce more than one product, and side reactions may occur.) substrate must bind to the active site before a reaction occurs. C) reaction occur at the active site, which usually consists of a crevice on the surface of the enzyme. D) an enzyme yields a specific product whereas a nonbiological catalyst may produce more than one product, and side reactions may occur.