Dictionary » N » Nucleolus

Nucleolus

Definition

noun, plural: nucleoli

The round granular structure within the nucleus of a cell, and composed of protein and RNA.


Supplement

Nucleolus is involved with ribosomal RNA synthesis and formation of ribosomes in eukaryotes.


Word origin: New Latin, from Latin, diminutive of nucleus, kernel.

Related forms: nucleolar (adjective).

See also: nucleus.


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Please help me identify this cell

... with the small purple dot is the one that interests me. Is the dot the nucleus and the light purple oval is the rest of the cell, or is it the nucleolus and the light purple is the nucleus? I want to guess from the histology books I looked over that it is a fibrocyte. I was told that the darker ...

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by Marauder21
Thu Apr 10, 2014 5:01 am
 
Forum: Cell Biology
Topic: Please help me identify this cell
Replies: 2
Views: 1003

Totipotent Stem Cell From Molecular Components

... DNA, RNA, Protein, and Fatty Acids as well as Glucose and other sugars. I am wondering. Should I start with the cell membrane or the nucleus and nucleolus(both are very important)? Q2 The pace of DNA replication is 8 2/3 hours for every chromosome and 2097152 of each chromosome in 1 week. Is ...

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by caters
Sun Feb 02, 2014 10:58 pm
 
Forum: Cell Biology
Topic: Totipotent Stem Cell From Molecular Components
Replies: 2
Views: 2266

Ribossome production paradox?

It is said that the cell nucleolus controls the production of rRNA, that is, it produces ribossomes. The DNA lingers in the nucleolus attached to proteins from where it begins the rRNA production process. But it is also said that the ...

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by Rutibrom
Thu Jul 05, 2012 12:00 am
 
Forum: Cell Biology
Topic: Ribossome production paradox?
Replies: 3
Views: 3314

MITOSIS PHASES QUESTION?

... undergoing mutation. 2. Prophase The DNA molecules progressively shorten and condense by coiling, to form chromosomes. The nuclear membrane and nucleolus are no longer visible. The spindle apparatus has migrate to opposite poles of the cell.. 3. Metaphase The spindle fibres attach themselves ...

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by HerrBiologie
Sun Oct 30, 2011 9:16 am
 
Forum: Cell Biology
Topic: MITOSIS PHASES QUESTION?
Replies: 2
Views: 4038

eukaryotic cells - link?

... with a detailed drawing/photograph/diagram of a eukaryotic cells as seen under and electron microscope with the following structures: nucleus, nucleolus, nuclear envelope, rough and smooth endoplasmic reticulum, golgi apparatus, ribosome, centrioles etc...

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by Boku
Sat Oct 15, 2011 2:20 pm
 
Forum: Cell Biology
Topic: eukaryotic cells - link?
Replies: 2
Views: 2405
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