----------------------------------------------------------------------------------Protein consists of four elements _____________,_______________, _____________ and ________________.__________________________ is the monomer for protein or polypeptide. Amino acids are made up of a basic group; ______________,______________, ____________ and____________________ which differs from one amino acid to another. Proteins are made up of repeated units of amino acids which link with each other via _____________________. ----------------------------------------------------------------------------------Draw the molecular structure amino acid with different coloured ring of basic group. ---------------------------------------------------------------------------------Formation and breakdown of a dipeptide + glycine glycine