Hydrogen bonds are responsible for the double-helical structure of [[DNA]], the bouyancy of ice in water, and for the tertiary and quaternary structure of [[Protein|proteins]]. Hydrogen bonds are relatively weak, especially compared with [[Metallic bond|metallic]], [[Ionic bond|ionic]] or [[Covalent|covalent]] bonds. | Hydrogen bonds are responsible for the double-helical structure of [[DNA]], the bouyancy of ice in water, and for the tertiary and quaternary structure of [[Protein|proteins]]. Hydrogen bonds are relatively weak, especially compared with [[Metallic bond|metallic]], [[Ionic bond|ionic]] or [[Covalent|covalent]] bonds. |