dna structure

acid acids adenine amino anatomy and base bases bio biochemistry biology biotechnology cell chemistry chromosome code codon concept cytosine deoxyribonucleic design diagram dna element evolution gene genetic genome genotype guanine health healthy helix human laboratory life medical medicine microbiology model molecular molecule mrna nucleic nucleobases nucleotide part phosphate replication research rna scheme science scientific sequence shape spiral strand structure sugar symbol technology thymine triplet twisted vector