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Cell component

Nucleolus

Nucleolus

A dynamic region inside the nucleus where ribosomal RNA is made and ribosome subunits begin to assemble.

Overview

EXPLORE BY LEVEL

The nucleolus is a visible region inside many nuclei. It helps make ribosomal RNA and assemble the parts that will become ribosomes. It is not surrounded by its own membrane.

Quick Facts

AT A GLANCE
Key ideaInside the nucleus; not membrane bound

Follow the Connections

See how Nucleolus links to other biological records.

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Cell componentNucleuscontains
All 1 Structured Connections
Nucleus · Cell componentCONTAINS →Nucleolus · Cell component

Recommended Reading

Trusted references for learning more about Nucleolus.

textbookThe Compartmentalization of CellsMolecular Biology of the Cell · NCBI Bookshelf textbookThe Universal Features of Cells on EarthMolecular Biology of the Cell · NCBI Bookshelf
Research Claims

Nucleolar structure emerges from multivalent interactions among rDNA, nascent rRNA, and proteins. Its organization responds to transcription, stress, and cell-cycle state.