The nucleolus is a non-membrane bound organelle located in the nucleus of eukaryotic cells.

It is responsible for the assembly and regulation of ribosomal subunits, which are important for protein synthesis.

The nucleolus is composed of DNA, RNA, and proteins.

The DNA in the nucleolus contains genes for ribosomal RNA (rRNA).

During interphase, the nucleolus is visible as a dense, irregularly shaped structure.

The nucleolus disappears during cell division (mitosis) and reforms after division is complete.

The nucleolus disappears during cell division (mitosis) and reforms after division is complete.

The size and number of nucleoli can vary depending on the cell type and its stage of growth and activity.

The nucleolus also plays a role in regulating gene expression, cell growth, and stress response.

The nucleolus also plays a role in regulating gene expression, cell growth, and stress response.

Abnormalities in the nucleolus can lead to a variety of diseases, including cancer.

Research on the nucleolus is ongoing, and it continues to be an area of active investigation in cell biology.