<prompt> Alpha helix is stabilized by?Disulfide linkageCovalent bondingHydrophobic interactionsHydrogen bonds  <response>: Secondary Structure includes Alpha helix Beta pleated sheet Beta bend or turn Alpha chain in collagen not alpha helix Structure Bonds Primary structure Covalentamidepeptide bond Secondary structure Hydrogen bonds Teiary structure Disulphide, Hydrogen, Hydrophobic and Ionic bond Quaternary structure Hydrogen, hydrophobic and ionic bond 