* Ribosome production: The nucleolus is responsible for synthesizing ribosomal RNA (rRNA), a crucial component of ribosomes. Ribosomes are the protein factories of the cell, responsible for translating genetic code into proteins.
* Assembly of ribosomal subunits: The rRNA produced in the nucleolus combines with ribosomal proteins (synthesized in the cytoplasm) to form the two subunits of a ribosome: the small subunit (40S) and the large subunit (60S).
* Regulation of cell growth and division: The nucleolus is involved in sensing cellular stress and regulating cell growth and division. Its size and activity can vary depending on the cell's needs.
In summary: The nucleolus acts as the cell's "ribosome factory," ensuring a constant supply of these essential protein-synthesizing organelles.
