DNA contains genetic code, codes for the primary structure of proteins, 3D polynucleotide formed by the condensation reaction between deoxyrbiose sugar and phsophate forming phosphodiester bonds between adjacent nucleotides, has nitrogenous bases- adenine, guanine, cytosine, and thymine, each complimentarily paired A-T, C-G bonded via hydrogen bonds. Hydrogen bonds form the double helix joing two DNA strands together, associated with histone protein