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Cell organelle


noun, plural: cell organelles

A membrane-bound compartment or structure in a cell that performs a special function.


A eukaryotic cell contains many organelles, for example, the nucleus, endoplasmic reticulum, golgi apparatus, mitochondria, and chloroplast (plastid). However, not all these organelles are found in only one cell or in an organism. The chloroplast, for instance, is abundant in plant cells but not in animal cells.

Prokaryotes, which were believed to have no organelles, have been recently described to possess “organelles”. Examples are carboxysome (a protein-shell compartment for carbon fixation in some bacteria), chlorosome (a light harvesting complex in green sulfur bacteria), magnetosome (found in magnetotactic bacteria), and thylakoid (in some cyanobacteria).

Word origin: New Latin organella, diminutive of Medieval Latin organum, organ of the body, from Latin, implement, tool

See also: nucleus, GERL.

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Re: Please help me decide which microscope to buy

... below the stage, allowing you to get close (plastic-thickness) to the cells without dumping the objective into the culture media. This will probably ... observation. If you need high-resolution images, down to the level of organelle structure, you will likely need to stain the cells anyway and ...

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by jonmoulton
Wed Nov 06, 2013 8:00 pm
Forum: General Discussion
Topic: Please help me decide which microscope to buy
Replies: 2
Views: 789


do prokaryotic cells have organelles??? by definition they have no membrane bound organelles but i think they dont have any at all. i ...

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by Avishek890
Sun Sep 01, 2013 6:13 am
Forum: Cell Biology
Topic: prokartotes
Replies: 4
Views: 1183

Re: How did endosymbionts coordinate replication?

... were ancient bacteria that survived in an ancient eukaryotic cell and continued to live as part of it as an organelle. So, I suppose, in any eukaryotic cell the mtDNA should be relatively conserved. ...

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by kk
Tue Feb 26, 2013 8:29 am
Forum: Cell Biology
Topic: How did endosymbionts coordinate replication?
Replies: 5
Views: 3010


... my text book, it says "Why is glycocalyx only found on the extracellular of the cell surface membrane?" should I answer it like: cause ... suggestions) btw, just realize, are there any glycocalyx formed on the organelles' plasma membrane? Organelles are also found in the cell and don't ...

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by gqh
Sun May 13, 2012 12:07 am
Forum: General Discussion
Topic: Glycocalyx
Replies: 2
Views: 3348

Please Help with Homework (fairly easy questions)

1. Which of the following structures in not found in all types of cells? A) cytoplasm B) ribosomes C) a nucleus D) a plasma membrane C) 2. The ... in the cell that produce A) proteins. B) DNA. C) membranes. D) organelles. A) 4. Which of the following statements is false? A) The plasma ...

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by billyfisher100
Wed Feb 15, 2012 6:46 pm
Forum: General Discussion
Topic: Please Help with Homework (fairly easy questions)
Replies: 6
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