Density (rho), viscosity (eta) and ultrasonic velocity (U) have been measured for L-glutamine, L-asparagine and L-lysine in water and aqueous glycerine (0, 0.5 and 1 mol dm(-3)) at 303.15 K. These measurements have been performed to evaluate some important parameters viz, adiabatic compressibility (beta), molar hydration number (n(H)), apparent molar compressibility (phi(k)), apparent molar volume (phi(y)), limiting apparent molar compressibility (phi(0)(K)), limiting apparent molar volume (phi(0)(y)) and their constants (S-K, S-y), transfer volume (Delta(0)(phi y)) and viscosity A and B coefficients of Jones-Dole equation. The results have been discussed in terms of solute-co-solute and ion-solvent interaction.