Question

The specificity of protein, in its enzymatic and physical properties depends upon

• A. Primary structure
• B. Peptide bonds
• C. Active site formed by a number of amino acid residues
• D. All of the above

Answer 1

The correct option is D All of the above

The primary structure of protein refers to the linear chain of amino acids joined together by peptide bonds. The linear chain folds upon itself to successively form secondary and tertiary structures. During folding a number of amino acids which are quite distinct in the primary structure, come to lie closer together to form the active site of enzyme. Thus, the properties and the active site depends on primary structure (linear chain) and its subsequent folding. The active site is responsible for the specificity of enzyme because the substrate molecules bind at the active site.