The bonds present in between amino acids in a polypeptide chain and monomers in a polysaccharide are:

In a polypeptide or a protein, amino acids are linked by a peptide bond which is formed when the carboxyl (-COOH) group of one amino acid reacts with the amino $\left(-{\mathrm{NH}}_2\right)$ group of the next amino acid with the elimination of a water moiety. In a polysaccharide the individual monosaccharides are linked by a glycosidic bond. This bond is also formed by dehydration.