deoxyribonucleic acid and ribonucleic acid with nucleobases formulas. dna and rna nucleobases structure - cytosine

structure deoxyribonucleic ribonucleic acid molecule rna nucleobase dna molecular formula description cytosine guanine adenine thymine uracil helical spiral educational diagram illustration base backbone nitrogenous chemistry genetic gene education medicine biology biochemistry vector medical helix hydrogen element analysis cell chromosome human deoxyribose skeletal nucleotide pyrimidine design chemical guaninednarna biological