What is the major stabilizing force in collagen triple helix?
Hydrogen bonding between glycine residues accurately defines or describes the concept asked in this question. Within Protein, precise definitions and terminology are essential for clear scientific communication. The other options (Covalent cross-links, Hydrophobic interactions, and Ionic bonding) either describe related but distinct concepts, use incorrect terminology, or confuse similar-sounding terms that have different scientific meanings. A thorough understanding of exact definitions helps distinguish between closely related biological concepts and is crucial for competitive examinations.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 4