Conservapedia - User contributions [en]

Prokaryotic cell

2007-03-14T19:25:58Z

Mpras:

A [[cell]] that lacks a defined nucleus and [[organelle]]s. Bacteria and blue-green algea are composed of prokaryotic cells and are called [[prokaryotes]]. <ref>http://biotech.icmb.utexas.edu/search/dict-search.html</ref>. Prokaryotes are single-cell organisms, although some can form colonies. <ref>http://www.iscid.org/encyclopedia/Prokaryotic_Organisms</ref> The prokaryote DNA is structurally simple and frequently is composed of only one circular chromosome. <ref>Brown, T.A. "Genomes" Garland Science ; c2002. </ref>

==See also==
*[[Eukaryotic cell]]

==References==
<references/>

[[Category:Biology]]

Eukaryotic cell

2007-03-14T18:46:43Z

Mpras:

A [[cell]] with a clearly defined nucleus and other structured subcellular components such as [[organelles]]. <ref> http://biotech.icmb.utexas.edu/search/dict-search.html</ref> All plants, animals, fungi, and single cell protists are composed of eukaryotic cells, and are collectively called [[eukaryotes]].<ref>http://www.iscid.org/encyclopedia/Eukaryote</ref> Compared to organisms lacking a nucleus ([[prokaryotes]]), eukaryotic genomes are far more complex structurally, contain multiple chromosomes, and are subject to a greater level of gene regulation. <ref> Berg, Jeremy M.; Tymoczko, John L.; and Stryer, Lubert."Biochemistry". W. H. Freeman and Co. ; c2002 </ref>

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==See also==
*[[Prokaryotic cell]]

==References==
<references/>

[[Category:Biology]]

Messenger RNA

2007-03-14T17:11:26Z

Mpras:

Messenger ribose nucleic acid (mRNA) is the RNA responsible for providing the genetic information for [[translation]].

==References==

<references/>

[[Category:Biology]]

Messenger RNA

2007-03-14T16:56:45Z

Mpras:

Messenger ribose nucleic acid (mRNA) is the the type of RNA cells use to synthesis proteins.

mRNA, like all RNA, is composed of four nucleic acids called bases, adenine (A), uracil (U), gaunine (G), and cytosine (C). RNA is created in a process called transcription. During transcription an enzyme called RNA polymerase binds to specific region of DNA, a gene, and uses the DNA nucleic acid sequence as a template to make a shorter, single stranded RNA. <ref> Alberts, Bruce; Johnson, Alexander; Lewis, Julian; Raff, Martin; Roberts, Keith; Walter, Peter. "Molecular Biology of the Cell". Garland Science ; c2002 </ref>

During [[translation]], the mRNA then is decoded to make protein. Combinations of three nucleic acids form a [[codon]]. Each codon corresponds with a specific [[amino acid]]. For example, the combination GAA codes for the amino acid glutamate. The translation machinery "reads" the mRNA and strings together the correct amino acids to form a protein. <ref> Alberts, Bruce; Johnson, Alexander; Lewis, Julian; Raff, Martin; Roberts, Keith; Walter, Peter. "Molecular Biology of the Cell". Garland Science ; c2002 </ref>

Claims that "the [[RNA]] that performs [[transcription]]" <ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
Educational Ministries, Inc. 1998</ref>
are erroneous because RNA is created by transcription.

==References==

<references/>

[[Category:Biology]]

Messenger RNA

2007-03-14T16:55:57Z

Mpras:

Messenger ribose nucleic acid (mRNA) is the the type of RNA cells use to synthesis proteins.

mRNA, like all RNA, is composed of four nucleic acids called bases, adenine (A), uracil (U), gaunine (G), and cytosine (C). RNA is created in a process called transcription. During transcription an enzyme called RNA polymerase binds to specific region of DNA, a gene, and uses the DNA nucleic acid sequence as a template to make a shorter, single stranded RNA. <ref> Alberts, Bruce; Johnson, Alexander; Lewis, Julian; Raff, Martin; Roberts, Keith; Walter, Peter. "Molecular Biology of the Cell". Garland Science ; c2002

During [[translation]], the mRNA then is decoded to make protein. Combinations of three nucleic acids form a [[codon]]. Each codon corresponds with a specific [[amino acid]]. For example, the combination GAA codes for the amino acid glutamate. The translation machinery "reads" the mRNA and strings together the correct amino acids to form a protein. <ref> Alberts, Bruce; Johnson, Alexander; Lewis, Julian; Raff, Martin; Roberts, Keith; Walter, Peter. "Molecular Biology of the Cell". Garland Science ; c2002

Claims that "the [[RNA]] that performs [[transcription]]" <ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
Educational Ministries, Inc. 1998</ref>
are erroneous because RNA is created by transcription.

==References==

<references/>

[[Category:Biology]]