nitrogen base
- adeninePurine nucleobase in DNA
- guaninePurine nucleobase in DNA
- cytosinePyrimidine nucleobase in genetics
- thymineDNA nitrogen base
- uracilRNA pyrimidine nucleobase
nucleotide · DNA · RNA · base pair · double helix · genetic code · hydrogen bond · Watson · complementary · codon · mutation · genome · replication · transcription · sugar · phosphate · backbone · strand