Answers
No, because the carboxyl group and amino group present on the alpha carbon only the it's help to make polypeptide chain.
Formation -co-nh2- peptide bonds.
Functional groups which have pure hydrocarbon alkyl group and aromatic group are generally non polar. Example valine(Val)V, leucine(Leu) L etc
Polar amino acids are those which are interested to dissolve in aqueous water due to hydroxyl group, carboxyl group ammonia group.Eg: serine(Ser)S, threonine(Thr)T
Histidine opposite charge at physiological ph.(His)H
.