Which types of bonds or interactions are found in the β-helix of protein?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → H-bond
The β-structure (β-pleated sheet / β-helix) of proteins is a secondary structure stabilized mainly by hydrogen bonds formed between the –NH group of one peptide bond and the C=O group of another peptide bond.
Why others are incorrect:
- Ionic bond → mainly in tertiary structure
- Covalent interaction → peptide bonds form primary structure
- Banana bond → found in strained molecules like cyclopropane, not proteins
Hence, the correct option is H-bond.