Queried GO term:

  idGO:0009112   Detailed information
  namenucleobase metabolic process
  namespacebiological_process
  def"The chemical reactions and pathways involving a nucleobase, a nitrogenous base that is a constituent of a nucleic acid, e.g. the purines: adenine, guanine, hypoxanthine, xanthine and the pyrimidines: cytosine, uracil, thymine." [GOC:ma]
  subsetgosubset_prok
  is_aGO:0006725 ! cellular aromatic compound metabolic process
  is_aGO:0046483 ! heterocycle metabolic process
  is_aGO:0055086 ! nucleobase-containing small molecule metabolic process

No monarch genes has the input GO term: GO:0009112.