Protein found in a biological system with a unique three dimensional structure and biological activity is called a native protein. When a protein in its native form, is subjected to a physical change like change in temperature or a chemical change like, change in pH, denaturation of protein takes place. Explain the cause.

Coagulation of egg white on boiling is an example of denaturation of protein. Explain in terms of structural changes.

Chemically denaturation does not change the primary structure of protein.

The chemical change in DNA molecule that could lead to synthesis of protein with an altered amino acid sequence is called

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?