Match List-I with List-II List-I Structure of Protein List-II Functio…

The correct answer is Option (1) → (A)-(II), (B)-(III), (C)-(I), (D)-(IV)

List-I Structure of Protein	List-II Function
(A) Primary Structure	(II) Sequence of amino acid
(B) Secondary structure	(III) Shape of polypeptide Chain
(C) Tertiary Structure	(I) Gives rise to Fibrous and Globular Proteins
(D) Quaternary Structure	(IV) Spatial arrangement of sub-units

• (A) Primary Structure: This is the most basic level, referring specifically to the sequence of amino acids in a polypeptide chain. Any change in this sequence can result in a different protein.
• Match: (A)-(II)
• (B) Secondary Structure: This refers to the shape of the polypeptide chain as it folds due to hydrogen bonding. Common shapes include the $\alpha$-helix and $\beta$-pleated sheet.
• Match: (B)-(III)

• (C) Tertiary Structure: This level represents the overall folding of the secondary structure. It gives rise to two major molecular shapes: Fibrous and Globular proteins. It is stabilized by various bonds like disulfide bridges and hydrophobic interactions.
• Match: (C)-(I)
• (D) Quaternary Structure: This refers to the spatial arrangement of sub-units (two or more polypeptide chains) with respect to each other. A classic example is hemoglobin.
• Match: (D)-(IV)