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Cell

Definition

noun

(Science: Cell Biology)

1. The structural, functional and biological unit of all organisms.

2. An autonomous self-replicating unit that may exist as functional independent unit of life (as in the case of unicellular organism), or as sub-unit in a multicellular organism (such as in plants and animals) that is specialized into carrying out particular functions towards the cause of the organism as a whole.

3. A membrane bound structure containing biomolecules, such as nucleic acids, proteins, and polysaccharides.


Supplement

There are two distinct types of cells: prokaryotic cells (e.g. bacterial cells) and eukaryotic cells (e.g. plant or animal cell). The main difference between the two is a well-defined nucleus surrounded by a membranous nuclear envelope present only in eukaryotic cells. Despite this difference they share a number of common features: the genetic information is stored in genes, proteins serve as their main structural material, ribosomes are used to synthesize proteins, adenosine triphosphate is the main source of metabolic energy to sustain various cellular processes, and a cell membrane that controls the flow of substances into and out of the cell.


Word origin: From Latin cella.
Related forms: cellular (adjective)
See also: cell biology, cytology, stem cell.


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Results from our forum


Re: Chromatin

... because instead of each centromere binding a single molecule of DNA you have two molecules bound at each centromere after replication. During cell division, the centromeres separate into two parts, each travelling with one molecule of DNA into a daughter cell. For a moment, before cytokinesis, ...

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by jonmoulton
Thu Sep 04, 2014 3:04 pm
 
Forum: Genetics
Topic: Chromatin
Replies: 2
Views: 184

Chromatin

If DNA residing in the cell is loosly packed DNA called chromatin, and if in the Interphase the chromatin replicates to prepare for mitosis, then it must be that when the chromatin replicated there were only 23 modules of DNA in the ...

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by Hannamerika
Thu Sep 04, 2014 9:12 am
 
Forum: Genetics
Topic: Chromatin
Replies: 2
Views: 184

Stem Cells

I think you can localize stem cells in lower organisms such as C. elegance by flurochrome labeled antibodies specific to specific proteins of stem cell.

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by josem
Wed Sep 03, 2014 9:32 pm
 
Forum: Genetics
Topic: Stem Cells
Replies: 5
Views: 4543

Re: Chromosome Differences

The DNA is never connected into a long single molecule in human cells. The DNA remains distributed into the 23 pairs of chromosomes (plus the mitochondrial chromosome), each single DNA molecules complexed with proteins. Each chromosome is replicated and ...

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by jonmoulton
Wed Sep 03, 2014 3:06 pm
 
Forum: Genetics
Topic: Chromosome Differences
Replies: 5
Views: 285

use of a bacterial protease inhibitor cocktail with mammalia

Dear fellow biochemists, I need some advice on Western Blotting, more specifically the use of certain protease inhibitors with the RIPA cell lysis buffer and protease inhibitor cocktail. A Millipore technical representative recommended my using "539134 | Protease Inhibitor Cocktail Set ...

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by rpwdoc
Tue Aug 26, 2014 10:08 pm
 
Forum: Cell Biology
Topic: use of a bacterial protease inhibitor cocktail with mammalia
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