Multiple choice general knowledge science & technology who first proposed triple-helical model for the structure of collagen? Francis Crick Ramachandran Linus Pauling Korana Reveal answer Fill a bubble to check yourself B Correct answer Explanation G.N. Ramachandran proposed the triple-helical structure for collagen in 1954. His model explained collagen's unique properties and stability, distinct from the alpha-helix and beta-sheet structures in other proteins.