ABSTRACT
Deoxyribonucleic acid, or DNA, is a polymer with the basic unit known as nucleotide, which consists of three parts: (1) standard unit of ive carbon deoxyribose (sugar) with phosphate and (2) variable unit known as bases known as purine and pyrimidine. Purine comprises adenine (A) and guanine (G), while Pyrimidine comprises cytosine (C) and thiamine (T). Nucleotides are connected to each other through their phosphate group. The bases are free to interact with each other, i.e. Adenine is interacted with Thiamine (A-T), Guanine is interacted with Cytosine (G-C). The DNA molecules are associated with speciic proteins to form a chromatics in the nucleus (Figs. 2.1 and 2.2).
