Genetic code - Revision history

DavidB4-bot: /* top */Spelling, grammar, and general cleanup

2017-05-27T02:27:22Z

top: Spelling, grammar, and general cleanup

DavidB4-bot: /* top */Spelling/Grammar Check, typos fixed: However → However,

2017-03-20T17:08:28Z

top: Spelling/Grammar Check, typos fixed: However → However,

DavidB4-bot: /* References */Category

2017-03-06T23:36:37Z

References: Category

JoeyJ at 19:54, February 11, 2017

2017-02-11T19:54:28Z

H22 at 21:23, October 30, 2016

2016-10-30T21:23:32Z

H22 at 21:21, October 30, 2016

2016-10-30T21:21:53Z

Martyp at 21:56, March 22, 2011

2011-03-22T21:56:59Z

BottomBleaching at 21:49, March 22, 2011

2011-03-22T21:49:30Z

DavidE: internal link

2011-03-22T21:24:04Z

internal link

Brit1909 at 21:12, March 22, 2011

2011-03-22T21:12:07Z

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 Three codons do not encode any amino acid but instead serve to mark the end of the protein. However, in some very specific proteins two of these codons encode the two very rare amino acids (selenocysteine and pyrrolysine). They are not present in majority of the proteins and require additional regulatory sequences to be included.
-Genetic code is the same for human, animals, plants and all other organisms. It may be differences and exceptions in some small and very specific genomes, but these are minor and rather rare. Scientists currently do not have explanation why the genetic code is universal when it would be  1.5&nbsp;×&nbsp;10<sup>84</sup> possible genetic codes to choose from.<ref name="isbn0-674-05075-4">{{cite book | vauthors = Yarus M | title = Life from an RNA World: The Ancestor Within | publisher = Harvard University Press | location = Cambridge | date = 2010 | pages = 163 | isbn = 0-674-05075-4 }}</ref>. It is also not clear why exactly these 20 amino acids have been selected as the protein building blocks. Much more different amino acids occur in the living world.
+Genetic code is the same for human, animals, plants and all other organisms. It may be differences and exceptions in some small and very specific genomes, but these are minor and rather rare. Scientists currently do not have explanation why the genetic code is universal when it would be  1.5&nbsp;×&nbsp;10<sup>84</sup> possible genetic codes to choose from.<ref name="isbn0-674-05075-4">{{cite book | vauthors = Yarus M | title = Life from an RNA World: The Ancestor Within | publisher = Harvard University Press | location = Cambridge | date = 2010 | pages = 163 | isbn = 0-674-05075-4 }}</ref> It is also not clear why exactly these 20 amino acids have been selected as the protein building blocks. Much more different amino acids occur in the living world.
 The "word" combinations in more complex genetic strings if written out could literally fill a space as large as an encyclopedia.

@@ Line 2: / Line 2: @@
 All living things use the same genetic code system, however, there exist some viruses that contain only RNA, which has the nucleotide base of [[uracil]] ("U") instead of thymine ("T"). While there are 64 possible three nucleotide combinations (codons), only 20 amino acids are normally used. Most of amino acids are encoded by multiple codons.
-Three codons do not encode any amino acid but instead serve to mark the end of the protein. However in some very specific proteins two of these codons encode the two very rare amino acids (selenocysteine and pyrrolysine). They are not present in majority of the proteins and require additional regulatory sequences to be included.
+Three codons do not encode any amino acid but instead serve to mark the end of the protein. However, in some very specific proteins two of these codons encode the two very rare amino acids (selenocysteine and pyrrolysine). They are not present in majority of the proteins and require additional regulatory sequences to be included.
 Genetic code is the same for human, animals, plants and all other organisms. It may be differences and exceptions in some small and very specific genomes, but these are minor and rather rare. Scientists currently do not have explanation why the genetic code is universal when it would be  1.5&nbsp;×&nbsp;10<sup>84</sup> possible genetic codes to choose from.<ref name="isbn0-674-05075-4">{{cite book | vauthors = Yarus M | title = Life from an RNA World: The Ancestor Within | publisher = Harvard University Press | location = Cambridge | date = 2010 | pages = 163 | isbn = 0-674-05075-4 }}</ref>. It is also not clear why exactly these 20 amino acids have been selected as the protein building blocks. Much more different amino acids occur in the living world.

← Older revision		Revision as of 23:36, March 6, 2017
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	[[Category:Genetics]]		[[Category:Genetics]]
−	[[Category:Molecular ~~biology~~]]	+	[[Category:Molecular Biology]]

← Older revision		Revision as of 19:54, February 11, 2017
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	[[Category:Genetics]]		[[Category:Genetics]]
		+	[[Category:Molecular biology]]

@@ Line 1: / Line 1: @@
 '''Genetic code''' is the instructions in a [[gene]] that tell the [[cell]] how to make a specific protein. A, T, G, and C are the "letters" of the [[DNA]] code; they stand for the chemicals [[adenine]], [[thymine]], [[guanine]], and [[cytosine]], respectively, that make up the nucleotide bases of DNA. Each gene's code combines the four chemicals in various ways to spell out 3-letter "words" that specify which amino acid is needed at every step in making a protein.
-All living things use the same genetic code system, however, there exist some viruses that contain only RNA, which has the nucleotide base of [[uracil]] ("U") instead of thymine ("T").
+All living things use the same genetic code system, however, there exist some viruses that contain only RNA, which has the nucleotide base of [[uracil]] ("U") instead of thymine ("T"). While there are 64 possible three nucleotide combinations (codons), only 20 amino acids are normally used. Most of amino acids are encoded by multiple codons.
-While there are 64 possible three nucleotide combinations (codons), only 20 amino acids are normally used. Most of amino acids are encoded by multiple codons. Three codons do not encode any amino acid but instead serve to mark the end of the protein. However in some very specific proteins two of these codons encode the two very rare amino acids (selenocysteine and pyrrolysine). They are not present in majority of the proteins and require additional regulatory sequences to be included.
+Three codons do not encode any amino acid but instead serve to mark the end of the protein. However in some very specific proteins two of these codons encode the two very rare amino acids (selenocysteine and pyrrolysine). They are not present in majority of the proteins and require additional regulatory sequences to be included.
-Genetic code is the same for human, animals, plants and all other organisms. It may be differences exceptions in some small and very specific genomes, but these are minor and rather rare. Scientists currently do not have explanation why the genetic code is universal when it would be  1.5&nbsp;×&nbsp;10<sup>84</sup> possible genetic codes to choose from.<ref name="isbn0-674-05075-4">{{cite book | vauthors = Yarus M | title = Life from an RNA World: The Ancestor Within | publisher = Harvard University Press | location = Cambridge | date = 2010 | pages = 163 | isbn = 0-674-05075-4 }}</ref>. It is also not clear why exactly these 20 amino acids have been selected as the protein building blocks. Much more different amino acids occur in the living world.
+Genetic code is the same for human, animals, plants and all other organisms. It may be differences and exceptions in some small and very specific genomes, but these are minor and rather rare. Scientists currently do not have explanation why the genetic code is universal when it would be  1.5&nbsp;×&nbsp;10<sup>84</sup> possible genetic codes to choose from.<ref name="isbn0-674-05075-4">{{cite book | vauthors = Yarus M | title = Life from an RNA World: The Ancestor Within | publisher = Harvard University Press | location = Cambridge | date = 2010 | pages = 163 | isbn = 0-674-05075-4 }}</ref>. It is also not clear why exactly these 20 amino acids have been selected as the protein building blocks. Much more different amino acids occur in the living world.
 The "word" combinations in more complex genetic strings if written out could literally fill a space as large as an encyclopedia.

@@ Line 1: / Line 1: @@
-'''Anal bleaching''' is the process of lightening the color of the skin around the anus. It is done for cosmetic purposes, to make the anus more uniform with the surrounding area.
+'''Genetic code''' is the instructions in a [[gene]] that tell the [[cell]] how to make a specific protein. A, T, G, and C are the "letters" of the [[DNA]] code; they stand for the chemicals [[adenine]], [[thymine]], [[guanine]], and [[cytosine]], respectively, that make up the nucleotide bases of DNA. Each gene's code combines the four chemicals in various ways to spell out 3-letter "words" that specify which amino acid is needed at every step in making a protein.
-==Procedure==
+The "word" combinations in more complex genetic strings if written out could literally fill a space as large as an encyclopedia.
-==Use==
+== Sources ==
-Anal bleaching was first used by adult film stars and exotic dancers to provide a less pigmented (lighter) appearance in that area. This got the attention of others who have discoloration in this area due to hormones causing the discoloration (such as after pregnancy) or other hereditary reasons. {{citation needed|date=October 2010}}
+http://www.genome.gov/glossary.cfm?key=genetic%20code%20%28ATGC%29
-==References==
+[[Category:Genetics]]

← Older revision		Revision as of 21:24, March 22, 2011
Line 1:		Line 1:
−	'''Genetic code''' is the instructions in a gene that tell the [[cell]] how to make a specific protein. A, T, G, and C are the "letters" of the [[DNA]] code; they stand for the chemicals [[adenine]], [[thymine]], [[guanine]], and [[cytosine]], respectively, that make up the nucleotide bases of DNA. Each gene's code combines the four chemicals in various ways to spell out 3-letter "words" that specify which amino acid is needed at every step in making a protein.	+	'''Genetic code''' is the instructions in a [[gene]] that tell the [[cell]] how to make a specific protein. A, T, G, and C are the "letters" of the [[DNA]] code; they stand for the chemicals [[adenine]], [[thymine]], [[guanine]], and [[cytosine]], respectively, that make up the nucleotide bases of DNA. Each gene's code combines the four chemicals in various ways to spell out 3-letter "words" that specify which amino acid is needed at every step in making a protein.
	All living things use the same genetic code system, however, there exist some viruses that contain only RNA, which has the nucleotide base of [[uracil]] ("U") instead of thymine ("T").		All living things use the same genetic code system, however, there exist some viruses that contain only RNA, which has the nucleotide base of [[uracil]] ("U") instead of thymine ("T").