dna structure. ladder configuration.

dna structure ladder configuration deoxyribonucleic acid double-stranded molecule carries genetic information living organisms consists long strands nucleotides twisted form double helix composed individual units called nucleotide three components: deoxyribose sugar phosphate group one four nitrogenous bases found adenine cytosine guanine thymine dna acid structure ladder adenine biochemistry biological information biology chains chemical chemistry composition cytosine damp deoxyribose design nucleotide helix drawing education education vector element formula guanine isolated molecular molecule phosphate polynucleotide purine purine base pyrimidine pyrimidine science skeletal thymine vector