NEETBotanyBiomolecules (B)
Protein Structural Level Example A. Primary structure 1. Hemoglobin B. Secondary structure 2. α-helix in keratin C. Tertiary structure 3. Myoglobin D. Quaternary structure 4. Collagen
Options
- AA - 3, B - 2, C - 1, D - 4
- BA - 1, B - 3, C - 2, D - 4
- CA - 2, B - 1, C - 3, D - 4
- DA - 4, B - 2, C - 1, D - 3
Correct answer
A. A - 3, B - 2, C - 1, D - 4
Step-by-step solution
Primary structure (A) is exemplified by Myoglobin (III) with its linear amino acid sequence. Secondary structure (B) includes features like the α-helix in keratin (II). Tertiary structure (C) is seen in Hemoglobin (I), which has a specific 3D structure. Quaternary structure (D) is exemplified by Collagen (IV), a protein with multiple polypeptide chains.