RNA: Difference between revisions
imported>Christopher M. Worsham m (added see also, categories) |
imported>Christopher M. Worsham (added types of RNA) |
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'''Riboucleic Acid''', or '''RNA''' is a [[polymer]] of [[nucleotides]] used for a variety of biological functions in living systems. In [[cell (biology)|cells]], it is primarily involved the creation of [[protein|proteins]] based the [[genetic code]] stored in [[DNA]]. | '''Riboucleic Acid''', or '''RNA''' is a [[polymer]] of [[nucleotides]] used for a variety of biological functions in living systems. In [[cell (biology)|cells]], it is primarily involved the creation of [[protein|proteins]] based the [[genetic code]] stored in [[DNA]]. | ||
==Types of RNA== | |||
====Messenger RNA==== | |||
In cells, ''messenger RNA'' (or ''mRNA'') is [[transcription (biology)|transcribed]] from a [[DNA]] template in the [[cell nucleus]]. Unnecessary pieces of the strand, called [[intron|introns]], are spliced out before the mRNA goes to the [[ribosome]], where its [[genetic code|sequence]] is read to create a [[protein]]. | |||
====Ribosomal RNA==== | |||
''Ribosomal RNA'' (or ''rRNA'') is synthesized in the [[nucleolus]], a small organelle within the nucleus, where it is formed into the main subunits of the [[ribosome]]. | |||
====Transfer RNA==== | |||
[[Amino acid|Amino acids]] are brought to the ribosome by small, specially-folded strands of RNA, called ''transfer RNA'' (or ''tRNA''). A specific amino-acid-carrying tRNA molecule "reads" the code on the mRNA, bringing in the appropriate amino acid. | |||
==See Also== | ==See Also== | ||
*[[genetics]] | *[[genetics]] | ||
*[[DNA]] | *[[DNA]] | ||
[[Category:Biology_Workgroup]] | [[Category:Biology_Workgroup]] | ||
[[Category:Chemistry_Workgroup]] | [[Category:Chemistry_Workgroup]] | ||
Revision as of 20:44, 27 June 2007
Riboucleic Acid, or RNA is a polymer of nucleotides used for a variety of biological functions in living systems. In cells, it is primarily involved the creation of proteins based the genetic code stored in DNA.
Types of RNA
Messenger RNA
In cells, messenger RNA (or mRNA) is transcribed from a DNA template in the cell nucleus. Unnecessary pieces of the strand, called introns, are spliced out before the mRNA goes to the ribosome, where its sequence is read to create a protein.
Ribosomal RNA
Ribosomal RNA (or rRNA) is synthesized in the nucleolus, a small organelle within the nucleus, where it is formed into the main subunits of the ribosome.
Transfer RNA
Amino acids are brought to the ribosome by small, specially-folded strands of RNA, called transfer RNA (or tRNA). A specific amino-acid-carrying tRNA molecule "reads" the code on the mRNA, bringing in the appropriate amino acid.