Deoxyribonucleic acid (DNA)

Definition: 

The molecule of inheritance, which consists of sequences of the four nucleotide bases: Adenine, Thymine, Guanine, and Cytosine. This molecule composed of two polynucleotide chains that coil around each other to form a double helix. It carries the genetic instructions for the development, functioning, growth and reproduction of all known organisms and some virus.