Importance Of Hydrogen Bonding In Biological Systems

Chemical Bonding of Class 11

IMPORTANCE OF HYDROGEN BONDING IN BIOLOGICAL SYSTEMS

Hydrogen bonding plays a vital role in physiological systems. Proteins contain chains of amino acids. The amino acid units are arranged in a spiral form somewhat like a stretched coil spring (forming a helix). The N-H group of each amino acid unit and the fourth C=O group following it along the chain, establishes the N–H---O hydrogen bonds. These bonds are partly responsible for the stability of the spiral structure. The double helix structure of DNA also consists of two strands forming a double helix and are joined to each other through a hydrogen bond.

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