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%ما هو (من)٪ 1 - تعريف
LARGEST STRUCTURE IN THE NUCLEUS OF EUKARYOTIC CELLS
Nucleoli; Cell nucleolus; Fibrillar center (FC); Dense Fibrillar Component (DFC); Granular component; Granular component (GC); Nucleolar dominance; Nucleole; Nucleolar; Dense Fibrillar Component; Dense fibrillar component; Fibrillar center; Fibrillar centers; Dense fibrillar components; Granular components; Nucleolar vacuole; Nucleolar vacuoles
![Electron micrograph of part of a [[HeLa]] cell. The image is a screen capture from [https://upload.wikimedia.org/wikipedia/commons/1/11/Live-cell-immunogold-labelling-of-RNA-polymerase-II-srep08324-s2.ogv this movie], which shows a Z-stack of the cell.](https://commons.wikimedia.org/wiki/Special:FilePath/NucleolusNCc.jpg?width=200 "Electron micrograph of part of a [[HeLa]] cell. The image is a screen capture from [https://upload.wikimedia.org/wikipedia/commons/1/11/Live-cell-immunogold-labelling-of-RNA-polymerase-II-srep08324-s2.ogv this movie], which shows a Z-stack of the cell.")
Nucleolus
·noun A little nucleus.
II. Nucleolus ·noun A small rounded body contained in the nucleus of a cell or a protozoan.
nucleolus
[?nju:kl?'??l?s]
¦ noun (plural nucleoli -l??) Biology a small dense spherical structure in a cell nucleus during interphase.
Derivatives
nucleolar adjective
Origin
C19: from late L., dimin. of L. nucleus (see nucleus).
Nucleolus
The nucleolus (, plural: nucleoli ) is the largest structure in the nucleus of eukaryotic cells. It is best known as the site of ribosome biogenesis, which is the synthesis of ribosomes.
ويكيبيديا
Nucleolus
The nucleolus (; PL nucleoli ) is the largest structure in the nucleus of eukaryotic cells. It is best known as the site of ribosome biogenesis, which is the synthesis of ribosomes. The nucleolus also participates in the formation of signal recognition particles and plays a role in the cell's response to stress. Nucleoli are made of proteins, DNA and RNA, and form around specific chromosomal regions called nucleolar organizing regions. Malfunction of nucleoli can be the cause of several human conditions called "nucleolopathies" and the nucleolus is being investigated as a target for cancer chemotherapy.
