Answer:
Proteins are defined as the biomolecules which are made up of one or more long chains of amino acid residues.
Proteins are responsible for several functions in human body including DNA replication, stimulus response, catalyzing metabolic reactions, and transporting molecules in the cells.
Protein varies in their structure on the basis of amino acid numbers. amino acid joined together with a bond called peptide bond and the process is called polymerization.
On the basis of their subunit proteins basically divide into three classes globular proteins, fibrous proteins, and membrane proteins.
