deoxyribonucleic acid spiral with dna nucleobases molecular formulas. dna molecule with nucleobases structure - cytosine

structure deoxyribonucleic spiral acid molecule nucleobase dna molecular formula description cytosine guanine adenine thymine helical educational diagram illustration base backbone sugar phosphate nitrogenous chemistry genetic science gene education medicine biology biochemistry vector model research bond medical helix hydrogen element analysis cell chromosome human deoxyribose skeletal infographic study nucleobases structural