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==Types of cells==

==Types of cells==

 

There are two main types of cells: prokaryotic<ref name="spell">Also spelled ''procariotic'' or ''procaryotic'' and ''eucariotic'' and ''eucaryotic''.</ref> cells, which lack a nucleus and certain [[organelles]], and eukaryotic<ref name="spell" /> cells, with a nucleus separated from cytoplasm by a nuclear membrane.

There are two main types of cells: prokaryotic<ref name="spell">Also spelled ''procariotic'' or ''procaryotic'' and ''eucariotic'' and ''eucaryotic''.</ref> cells, which lack a nucleus and certain [[organelles]], and eukaryotic<ref name="spell" /> cells, with a nucleus separated from cytoplasm by a nuclear membrane.

Each cell contains at least one complete copy of the organism's [[genome]].

Each cell contains at least one complete copy of the organism's [[genome]].

Prokaryotic cells may also have specialized features such as [[flagellum]] and [[pili]]. Prokaryotic cells can also carry accessory DNA known as [[plasmids]] that code for functions such as antibiotic resistance or the metabolism of lactose.  Plasmids are stored separately from the organism's [[genome]] and are shared between other prokaryotic cells.

Prokaryotic cells may also have specialized features such as [[flagellum]] and [[pili]]. Prokaryotic cells can also carry accessory DNA known as [[plasmids]] that code for functions such as antibiotic resistance or the metabolism of lactose.  Plasmids are stored separately from the organism's [[genome]] and are shared between other prokaryotic cells.

A eukaryotic cell is divided into a number of membrane bound compartments known as [[organelles]], each with its own structure and function. In a typical cell these components are:

A eukaryotic cell is divided into a number of membrane bound compartments known as [[organelles]], each with its own structure and function. In a typical cell these components are:

* [[Nucleus]]

* [[Nucleus]]