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Dictionary » N » Nucleoid

Nucleoid

Definition

noun, plural: nucleoids

The portion within a prokaryotic cell where the genetic material is to be found.


Supplement

In contrast to eukaryotes with a nucleus, prokaryotes have a nucleoid where the genetic material can be found. The nucleoid is different from the nucleus of the eukaryotes in a way that the genetic material is not enclosed in a membrane to separate it from the cytoplasm.


Word origin: nucleo- + -oid; thus "like a nucleus".
Related forms: nucleoidal (adjective)

Related term:


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Genes in bacteria?

... not found a clear answer anywhere. Genes in bacteria are found in: Nucleus microbody chloroplast The paired chromosomes present in all organisms nucleoid I think is :|The paired chromosomes present in all organisms but not sure thank you in advance.

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by cpu2007
Sun Aug 23, 2009 12:53 pm
 
Forum: Genetics
Topic: Genes in bacteria?
Replies: 2
Views: 59

Re: Prokaryotes Question

... organelles: carboxysome - carbon fixation chlorosome - photosynthesis flagellum - movement in external medium magnetosome - magnetic orientation nucleoid - DNA maintenance plasmid - DNA exchange ribosome - translation of RNA into proteins thylakoid - photosynthesis http://en.wikipedia.org/wiki/Organelle ...

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by GaryGaulin
Fri Feb 27, 2009 2:06 am
 
Forum: Cell Biology
Topic: Prokaryotes Question
Replies: 8
Views: 921

The Fiber Disease

... rpoS, and rbsD (4), and it has been demonstrated to regulate two of these genes, hns and rpoS, by RNA-RNA interactions (4, 5). H-NS is an abundant nucleoid-structuring protein with global transcriptional repressor functions (6, 7). DsrA antagonizes H-NS function by decreasing the levels of H-NS ...

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by Skytroll
Wed Sep 06, 2006 4:29 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 748645

prokaryocytes

prokaryotic is a cell that doesn't have many organelles, it just has circular nucleus (nucleoid), doesn't have nucleus membrane, has ribosome, and mitocondria is replaced by mesosome... but i don't know the meaning of prokariocytes... sorry...

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by njin
Thu Mar 02, 2006 4:37 am
 
Forum: Cell Biology
Topic: prokaryocytes
Replies: 4
Views: 1982

cell biology

Yup. nucleoid doesn't need centriole.. :mrgreen:

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by victor
Sat Dec 03, 2005 2:32 pm
 
Forum: Cell Biology
Topic: cell biology
Replies: 3
Views: 835
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