How do biomolecules complement each other?​

A molecule or subunit that functions alone or combines with other similar molecules to form a polymer. All of the biomolecules that make up our cells are made up of strings of monomers. For example, proteins are made up of strings of amino acids and nucleic acids are strings of nucleotides.

the porson above me is right

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).