Nucleus: Difference between revisions

Revision as of 19:55, 25 November 2010

The Nucleus is the cell 'control centre' found in Eukaryotes. It is the source of the cell's DNA and RNA and is where Transcription takes place.

It is comprised of:

A Nuclear Envelope = twin membrane that protects contents from cytoplasm and macromolecules that could interfere with internal processes. Nuclear pores perforate the membrane and allow small molecules to diffuse freely in and out of the structure. Macromolecules (like nucleic acids) are moved into the nucleus via active transport.
Nucleoplasm = this material comprises mostly of Chromatin
Nucleolus = 'core' of Nucleus, relatively unstable structure without a membrane contains rRNA (ribosomal RNA) and is the site of Ribosome synthesis.

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 It is comprised of:
-)&nbsp;A Nuclear Envelope = twin membrane that protects contents from cytoplasm and macromolecules that could interfere with internal processes. Nuclear pores perforate the membrane and allow small molecules to&nbsp;diffuse&nbsp;freely in and out of the structure. Macromolecules (like nucleic acids)&nbsp;are moved into the nucleus&nbsp;via active transport.
+#A [[Nuclear Envelope|Nuclear Envelope]] = twin membrane that protects contents from cytoplasm and macromolecules that could interfere with internal processes. [[Nuclear pores|Nuclear pores]] perforate the membrane and allow small [[Molecule|molecules]] to&nbsp;diffuse&nbsp;freely in and out of the structure. Macromolecules (like [[Nucleic acids|nucleic acids]])&nbsp;are moved into the nucleus&nbsp;via active transport.
+#[[Nucleoplasm|Nucleoplasm]] = this material comprises mostly of [[Chromatin]]
-) Nucleoplasm = this material comprises mostly of [[Chromatin]]
+#[[Nucleolus|Nucleolus]] = 'core' of Nucleus, relatively unstable structure without a membrane&nbsp;contains [[rRNA|rRNA]]&nbsp;([[rRNA|ribosomal RNA]]) and is the site of [[Ribosome|Ribosome]]&nbsp;synthesis. &nbsp;
-)&nbsp;Nucleolus = 'core' of Nucleus, relatively unstable structure without a membrane&nbsp;contains rRNA&nbsp;(ribosomal RNA) and is the site of [[Ribosome|Ribosome]]&nbsp;synthesis. &nbsp;