Question

Which types of bonds or interactions are found in the $\beta$-helix of protein?

• A. Ionic bond
• B. Covalent interaction
• C. H-bond
• D. Banana bond

Hint:

The $\beta$-helix structure is stabilized mainly by hydrogen bonds, which form between the backbone of the protein.

Answer 1

The Correct Option is C

Phase 1: Comprehending the $\beta$-helix.
The $\beta$-helix protein structure is primarily reinforced by hydrogen bonds (H-bonds) formed between the backbone amide and carbonyl groups of the polypeptide chain.
Phase 2: Evaluating the choices.
- Ionic bond: Ionic bonds generally do not contribute to the stabilization of the $\beta$-helix.
- Covalent interaction: While covalent bonds are fundamental to proteins, they are not the principal stabilizing forces within the $\beta$-helix.
- H-bond: Hydrogen bonds are the predominant interactions that stabilize the $\beta$-helix.
- Banana bond: This is an invalid classification of a bond in protein structures.
Phase 3: Determination.
Hydrgen bonds (H-bonds) are the correct interaction responsible for stabilizing the $\beta$-helix.
Final Determination: \[\boxed{\text{The correct answer is (3) H-bond.}}\]