cytosine hexnut, c. pyrimidine nucleobase molecule. present in dna. 3d on white background

acid ancestry background bio biochemistry biology bond bonding carbon cell chromosome copy cytoplasm cytosine deoxyribonucleic dna double formula gene genealogical genealogy genetics genome helical helix heredity hexnuteducational hydrogen identical identify illustration information medical model molecule nitrogen nucleic nucleotide nucleotides nucleus oxygen pair phosphorus pyrimidine replication science structure telomere test vector white