NEETBotanyBiomolecules (B)
Protein Structure Level Description A. Primary structure 1. 3D folding due to interactions between R groups B. Secondary structure 2. Linear sequence of amino acids C. Tertiary structure 3. α-helix and β-sheet formation D. Quaternary structure 4. Association of multiple polypeptide chains
Options
- AA - 2, B - 3, C - 1, D - 4
- BA - 1, B - 2, C - 4, D - 3
- CA - 3, B - 4, C - 2, D - 1
- DA - 4, B - 3, C - 1, D - 2
Correct answer
A. A - 2, B - 3, C - 1, D - 4
Step-by-step solution
Primary structure (A) refers to the linear sequence of amino acids (II) in a polypeptide chain. Secondary structure (B) involves α-helix and β-sheet formation (III) stabilized by hydrogen bonds. Tertiary structure (C) is the 3D folding (I) of a single polypeptide chain due to interactions between R groups. Quaternary structure (D) is the association of multiple polypeptide chains (IV) into a functional protein.