Name two biologically important compounds that contain both oxygen and nitrogen.

(N/A) Two biologically important compounds that contain both oxygen and nitrogen are amino acids and nucleic acids ($DNA$ and $RNA$). Amino acids are the building blocks of proteins and contain an amino group $(-NH_2)$ and a carboxyl group $(-COOH)$. Nucleic acids contain nitrogenous bases,sugars,and phosphate groups,all of which involve both nitrogen and oxygen atoms.