The $$\alpha$$-Helix and $$\beta$$- Pleated sheet structure of protein are associated with its :

The α-helix and β-pleated sheet structures of protein are associated with the secondary structure of proteins.

Primary structure: sequence of amino acids

Secondary structure: local folding patterns (α-helix, β-pleated sheet) stabilized by hydrogen bonds between peptide bonds

Tertiary structure: overall 3D shape

Quaternary structure: arrangement of multiple polypeptide subunits

The correct answer is Option 3: secondary structure.