<prompt> Most Basic amino acid isLecuineIstidineArginineGlutamic acid  <response>: C Arginine Aminoacid can be acidic, basic or neutral depending up on their side chain. The lower the Pka of the R gp, the more acidic will be the amino acids, so aminoacid with the highest Pka of the RGP will be most basic.Basic Amino AcidPka of R group Arginine12.5 Lysine10.8 Histidine6.0 