Nucleolus

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[[image:nucleolus1.jpg align="right"]]

 * ===== Located in the nucleus =====
 * ===== present in nuclear matrix =====
 * ===== found in eukaryotic cells =====

Functions:

 * ===== The nucleolus produces ribosomes, which move out of the nucleus to positions on the rough endoplasmic reticulum where they are critical in protein synthesis. =====
 * ===== Helps with the production of subunits which together form the ribosomes. =====
 * Plays an indirect role in protein synthesis.
 * Involved in RNA metabolism.
 * Involved in RNP assembly events.

Composed of:
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 * ===== Composed of granular and fibrillar components =====
 * main components are RNA, DNA, and proteins.
 * RNA helps for protein manufacture.

Characteristics:
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 * =====Spherical shape =====
 * =====Visible when cell is not dividing =====
 * =====Bigger than other cells and covers almost half of the nucleus. =====
 * Attributed to hundred of R-genes.