A catalyst always increases the rate of reaction.

A catalyst increases the rate of a reaction by:

Read the given passage and answers following questions : A substance which alters the rate. of chemical reaction without itself undergoing any change in mass and chemical composition at the end' of reaction is called catalyst. It may be noted that a catalyst which increase the speed of a reaction are called positive catalyst and catalyst which decrease the speed of reaction are called negative catalyst. The promoters are substances that enhance activity of catalyst and poisons which decrease the activity of catalyst. The synthesis of proteins is governed by RNA. what is catalyst?