Answer. Proteins are highly complicated nitrogenous compounds made up of amino acids. Proteins consist of carbon, hydrogen, oxygen, nitrogen and sulphur. Protein has more than 10,000 amino acids, linked through peptide linkage to form proteins.
acid and carboxyl acid group of another amino acid. Such as:
H2N-CH-COOH + HNH-CH-COOH -H20 H2N - CH-C — NH- CH-COOH
R R R R
(Dehydration) Peptide linkage