Prokaryote: Difference between revisions
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Prokaryotes are a group of [[Organism|organisms]] which are separated from [[Eukaryote|eukaryotes]]. Unlike eukaryotes, they do not have membrane-bound organelles such as the [[Nucleus|nucleus]], [[Mitochondria|mitochondrion]]. Prokaryotes have a [[ | Prokaryotes are a group of [[Organism|organisms]] which are separated from [[Eukaryote|eukaryotes]]. Unlike eukaryotes, they do not have membrane-bound [[organelles|organelles]] such as the [[Nucleus|nucleus]], [[Mitochondria|mitochondrion]]. Prokaryotes have a [[Cell wall]]<span style="font-size: 13.28px;"> which is made out of peptidoglycan. It's function is to provide support for the cell and protect against damage from osmotic rupture or from mechanical stress.</span><span style="font-size: 13.28px;"> Their genetic materials float free in the </span>[[Cytoplasm|cytoplasm]]<span style="font-size: 13.28px;"> of the cells. An example of a prokaryote is </span>[[Escherichia coli|''E. coli'']]<span style="font-size: 13.28px;">. Prokayotes can be classified into two domains: </span> | ||
#<span style="font-size: 13.28px;" />[[Bacteria|Bacteria]]<span style="font-size: 13.28px;"> </span> | |||
#[[Archaea|Archaea]]<span style="font-size: 13.28px;">. </span> | |||
<span style="font-size: 13.28px;">Some of them live in adverse environments, such as hot springs and salt lakes, which are considered to be inhospitable to sustain the lifes of other kinds of organisms. Arachea, also known as extremophiles, have structures that are non-typical to other kinds of </span>[[Eukaryotes|eukaryotes]]<span style="font-size: 13.28px;"> and bacteria. Unlike normal </span>[[Plasma membrane|plasma membrane]]<span style="font-size: 13.28px;"> which is made of phospholipid bilayer, some of their plasma membranes are composed of phospholipid monolayer, these archaea fuse the heads of the phospholipid molecules into a single molecule with two hydrophilic heads. This might help the organism to be more rigid and to adapt better to the harsh environment. Ferroplasma is one of the members of the archaean which lives in extremely acidic habitat, having this extraordinary structure is thought to aid their survival.</span> | |||
Revision as of 16:59, 4 December 2016
Prokaryotes are a group of organisms which are separated from eukaryotes. Unlike eukaryotes, they do not have membrane-bound organelles such as the nucleus, mitochondrion. Prokaryotes have a Cell wall which is made out of peptidoglycan. It's function is to provide support for the cell and protect against damage from osmotic rupture or from mechanical stress. Their genetic materials float free in the cytoplasm of the cells. An example of a prokaryote is E. coli. Prokayotes can be classified into two domains:
Some of them live in adverse environments, such as hot springs and salt lakes, which are considered to be inhospitable to sustain the lifes of other kinds of organisms. Arachea, also known as extremophiles, have structures that are non-typical to other kinds of eukaryotes and bacteria. Unlike normal plasma membrane which is made of phospholipid bilayer, some of their plasma membranes are composed of phospholipid monolayer, these archaea fuse the heads of the phospholipid molecules into a single molecule with two hydrophilic heads. This might help the organism to be more rigid and to adapt better to the harsh environment. Ferroplasma is one of the members of the archaean which lives in extremely acidic habitat, having this extraordinary structure is thought to aid their survival.