{{stub}}A '''hydrogen bond''' is an attraction between [[Chemical polarity|polar molecules]]. They are formed when oppositely charge ends of polar molecules are attracted to one another. This weak attractive force is the hydrogen bond.
{{stub}}A '''hydrogen bond''' is an attraction between [[Chemical polarity|polar molecules]]. They are formed when oppositely charge ends of polar molecules are attracted to one another. This weak attractive force is the hydrogen bond.
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Hydrogen bonds are responsible for the double-helical structure of [[DNA]], and for the tertiary and quaternary structre of [[Protein|proteins]]. Hydrogen bonds are relatively weak, especially compared with [[Metallic bond|metallic]], [[Ionic bond|ionic]] or [[Covalent|covalent]] bonds.
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Hydrogen bonds are responsible for the double-helical structure of [[DNA]], 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.