NEETBotanyBiomolecules (B)
Protein Structure Level Description A. Primary structure 1. Interactions between R groups of different polypeptide chains B. Secondary structure 2. Localized folding into α-helices and β-sheets C. Tertiary structure 3. Linear sequence of amino acids D. Quaternary structure 4. Overall 3D shape of a single polypeptide chain
Options
- AA - 3, B - 2, C - 4, D - 1
- BA - 1, B - 3, C - 2, D - 4
- CA - 2, B - 3, C - 1, D - 4
- DA - 3, B - 1, C - 4, D - 2
Correct answer
A. A - 3, B - 2, C - 4, D - 1
Step-by-step solution
rimary structure (A) refers to the linear sequence of amino acids (III). Secondary structure (B) involves localized folding into α-helices and β-sheets (II) due to hydrogen bonding. Tertiary structure (C) is the overall 3D shape of a single polypeptide chain (IV) resulting from interactions among secondary structures. Quaternary structure (D) is the interaction between R groups of different polypeptide chains (I) forming a functional protein complex.