Keratin in skin is softer than keratin in nail because keratin in skin has:: (A) Less number of disulphide bonds, (B) Less number of salt bridges, (C) High sodium content, (D) Different affinity for water
Answer is A. A i.e. Less number of disulphide bondsKeratin in skin is softer than keratin in nail, horn & hooves because skin keratin has less number of disulfide bondsQ between Cys residues of adjacent polypeptide chains.