Amino acid with a basic side chain:: (A) Methionine, (B) Leucine, (C) Aspartic acid, (D) Histidine
Answer is D. Amino acids with basic side chain: Histidine, Lysine, Arginine.
Amino acids with acidic side chain: Aspartic acid, Glutamic acid.
Non charged polar amino acids: Cysteine, Asparagine, Serine, Threonine, Glutamine, Tyrosine (CAST GaTe)