Biomolecules Part 1

In secondary structure of protein, hydrogen bond is formed
between $-\stackrel{\stackrel{\mathrm{O}}{\left|\right|}}{\mathrm{C}}-$ and $-\mathrm{NH}-$ groups of the peptide bond.
Peptide linkage is an amide formed between $-\mathrm{COOH}$ group and $-{\mathrm{NH}}_2$ group while connecting two amino acids.
The two monosaccharides are joined together by an oxide linkage formed by the loss of a water molecule is called glycosidic linkage.