Larger nucleoli are present in dividing cells.
It is a site for active ribosomal RNA synthesis.
It is a membrane-bound structure.
It takes part in spindle formation.
Nucleolus is the spherical structure present in the nucleoplasm. It is the site of ribosomal RNA (rRNA) synthesis. The nucleolus is not membrane-bound; it is a region within the nucleus where rRNA is transcribed and ribosomal subunits are assembled. Larger nucleoli are often observed in cells that are actively synthesizing proteins and thus require a high number of ribosomes. The spindle formation is carried out by centrosomes and microtubules, not the nucleolus.