The globular nuclear organelle formed at the nucleolar organizer Site of ribosome construction An organelle found in the nucleus, containing rRNA and multiple copies of the genes coding for rRNA
The organelle, located within the eucaryotic nucleus and not bounded by a membrane, that is the location of ribosomal RNA synthesis and the assembly of ribosomal subunits (See 87)
a small round body of protein in a cell nucleus; nucleoli contain RNA and are involved in protein synthesis