Basic amino acids are: (A) Lysine and Arginine, (B) Serine and cystein, (C) Phenylalanine and Tyrosine, (D) Aspartic acid and Glutamic acid
Answer is A. (Lysine and Arginine) (47- U.Satyanarayan 3rd)Classification of Amino acids1.Amino acid with aliphatic side chains - Glycine, Alanine, valine, leucine and Isoleucine2.Hydroxyl group containing amino acids- Serine, threonine and tyrosine3.Sulfur containing amino acids - cysteine, methionine4.Acidic ami noacids - Aspartic acid, glutamic acid5.Basic amino acids - Lysine, arginine, histidine6.Aromatic amino acids - Phenyl alanine, tyrosine and tryptophan7.Imino acids - Proline