what are proteins?they are polymers or biomolecule?

Proteins are large biological molecules, or macromolecules. They consist of one or more chains of amino acid residues forming peptide bonds.

Yes, proteins are biomolecules which are also considered as polymers as they constains many small molecules of amino acids bonded together end-to-end in chain through peptide bonds to form a large molecules having many functions such as enzymatic functions.