The role of catalysts is critical in many chemical reactions.They have great consequence in the fields of medicine andpharmacology. On the basis of your research, respond to thefollowing: Identify the two important classes of catalysts. Choosea catalyst that exists in the human body. Explain its importanceand how it works. Analyze the chemical reactions that take placewhen a biological catalyst combines with a reactant (substrate) toform an unstable intermediate.