uracil hexnut, u. pyrimidine nucleobase molecule. present in dna. 3d on white background

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