EOG88PQ1N GO:0005634 26/83 nucleus cellular_component "A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent." [GOC:go_curators] EOG88PQ1N GO:0042255 26/83 ribosome assembly biological_process "The aggregation, arrangement and bonding together of the mature ribosome and of its subunits." [GOC:ma] EOG88PQ1N GO:0003723 25/83 RNA binding molecular_function "Interacting selectively and non-covalently with an RNA molecule or a portion thereof." [GOC:mah]