Vipul: /* Definition */

2012-05-25T15:37:23Z

Definition

← Older revision		Revision as of 15:37, 25 May 2012
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	==Definition==		==Definition==

	'''Prokaryotic cells''' are a certain cell type based on the [[organism]]s which house these cells, which are called '''prokaryotic organisms''' (in other words, all cells in prokaryotic organisms are prokaryotic cells, and all prokaryotic cells are cells of prokaryotic organisms). These are contrasted from [[eukaryotic cell]]s ~~(the~~ cells of prokaryotic organisms, which may be in the [[archaea]] or [[bacteria]] domain).		'''Prokaryotic cells''' are a certain cell type based on the [[organism]]s which house these cells, which are called '''prokaryotic organisms''' (in other words, all cells in prokaryotic organisms are prokaryotic cells, and all prokaryotic cells are cells of prokaryotic organisms). These are contrasted from [[eukaryotic cell]]s. The cells of prokaryotic organisms, which may be in the [[archaea]] or [[bacteria]] domain.

	All prokaryotic organisms are [[unicellular organism]]s, so the prokaryotic cell ''is'' the prokaryotic organism. In contrast, eukaryotic organisms include both unicellular and multicellular organisms.		All prokaryotic organisms are [[unicellular organism]]s, so the prokaryotic cell ''is'' the prokaryotic organism. In contrast, eukaryotic organisms include both unicellular and multicellular organisms.
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	\| arrangement of [[DNA]] \|\| [[DNA]] is arranged in one or more [[chromosome]]s, which are rod-shaped structures, inside the nucleus. \|\| DNA is arranged in a single circle.		\| arrangement of [[DNA]] \|\| [[DNA]] is arranged in one or more [[chromosome]]s, which are rod-shaped structures, inside the nucleus. \|\| DNA is arranged in a single circle.
	\|-		\|-
	\| cell size (diameter) \|\| In[[micron]]s: <math>\! 10-100 \mu m</math><br><math>1 \mu m = 10^{-6}m</math> \|\| <math>\! 1 - 10 \mu m</math><br><math>1 \mu m = 10^{-6}m</math>		\| cell size (diameter) \|\| In [[micron]]s: <math>\! 10-100 \mu m</math><br><math>1 \mu m = 10^{-6}m</math> \|\| <math>\! 1 - 10 \mu m</math><br><math>1 \mu m = 10^{-6}m</math>
	\|-		\|-
	\| cellularity of organism \|\| eukaryotic organisms could be [[unicellular organism]]s or [[multicellular organism]]s \|\| prokaryotic organisms are always [[unicellular organism]]s, though the cells may cluster and communicate with each other for some prokaryotic organisms.		\| cellularity of organism \|\| eukaryotic organisms could be [[unicellular organism]]s or [[multicellular organism]]s \|\| prokaryotic organisms are always [[unicellular organism]]s, though the cells may cluster and communicate with each other for some prokaryotic organisms.
	\|}		\|}

Vipul: Created page with "==Definition== '''Prokaryotic cells''' are a certain cell type based on the organisms which house these cells, which are called '''prokaryotic organisms''' (in other words, ..."

2011-12-17T22:08:42Z

Created page with "==Definition== '''Prokaryotic cells''' are a certain cell type based on the organisms which house these cells, which are called '''prokaryotic organisms''' (in other words, ..."

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==Definition==

'''Prokaryotic cells''' are a certain cell type based on the [[organism]]s which house these cells, which are called '''prokaryotic organisms''' (in other words, all cells in prokaryotic organisms are prokaryotic cells, and all prokaryotic cells are cells of prokaryotic organisms). These are contrasted from [[eukaryotic cell]]s (the cells of prokaryotic organisms, which may be in the [[archaea]] or [[bacteria]] domain).

All prokaryotic organisms are [[unicellular organism]]s, so the prokaryotic cell ''is'' the prokaryotic organism. In contrast, eukaryotic organisms include both unicellular and multicellular organisms.

The key features of prokaryotic cells in contrast with eukaryotic cells are given below:

{| class="sortable" border="1"
! Attribute !! For eukaryotic cells !! For prokaryotic cells
|-
| existence of membrane-bound [[organelle]]s, i.e., clear-cut [[compartmentalization]] || Eukaryotic cells have membrane-bound organelles, and hence clear-cut intracellular compartmentalization. || Prokaryotic cells do ''not'' have membrane-bound organelles. Although different regions of the cell perform different functions, these are not clearly separated organelles.
|-
| existence of a membrane-bound [[nucleus]] || Eukaryotic cells have a [[nucleus]] bounded by a double membrane. || Prokaryotic cells have a nucleus-like region called a [[nucleoid]] but this does not have a membrane.
|-
| arrangement of [[DNA]] || [[DNA]] is arranged in one or more [[chromosome]]s, which are rod-shaped structures, inside the nucleus. || DNA is arranged in a single circle.
|-
| cell size (diameter) || In[[micron]]s: <math>\! 10-100 \mu m</math><br><math>1 \mu m = 10^{-6}m</math> || <math>\! 1 - 10 \mu m</math><br><math>1 \mu m = 10^{-6}m</math>
|-
| cellularity of organism || eukaryotic organisms could be [[unicellular organism]]s or [[multicellular organism]]s || prokaryotic organisms are always [[unicellular organism]]s, though the cells may cluster and communicate with each other for some prokaryotic organisms.
|}

Prokaryotic cell - Revision history

Vipul: /* Definition */

Vipul: Created page with "==Definition== '''Prokaryotic cells''' are a certain cell type based on the organisms which house these cells, which are called '''prokaryotic organisms''' (in other words, ..."