RNA: Difference between revisions
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== RNA involved in gene expression == | == RNA involved in gene expression == | ||
1. [[MRNA|mRNA]] – messenger RNA <ref>Berg JM, Tymoczko JL and Stryer L, 2007, Biochemistry 6th edition, NY, W. H Freeman and Company, page 119</ref><br> | 1. [[MRNA|mRNA]] – messenger RNA <ref>Berg JM, Tymoczko JL and Stryer L, 2007, Biochemistry 6th edition, NY, W. H Freeman and Company, page 119</ref><br> | ||
- [[DNA|DNA]] is transcribed into [[MRNA|mRNA]], therefore the [[MRNA|mRNA]] and the [[DNA|DNA]] are complementary<br> - This [[MRNA|mRNA]] is then used as a template for translation into a functioning protein<br> - [[MRNA|mRNA]] is also used to make [[CDNA|copy DNA]] ([[CDNA|cDNA]])<br>2. [[ | - [[DNA|DNA]] is transcribed into [[MRNA|mRNA]], therefore the [[MRNA|mRNA]] and the [[DNA|DNA]] are complementary<br> - This [[MRNA|mRNA]] is then used as a template for translation into a functioning protein<br> - [[MRNA|mRNA]] is also used to make [[CDNA|copy DNA]] ([[CDNA|cDNA]])<br>2. [[TRNA|tRNA]] – transfer RNA <ref>Berg JM, Tymoczko JL and Stryer L, 2007, Biochemistry 6th edition, NY, W. H Freeman and Company, page 120</ref><br> - consists of a sequence of three bases and an associated amino acid<br> - This [[Molecule|molecule]] travels to the ribosome where a [[Polypeptide|polypeptide]] is formed, the sequence of which was determined by the [[MRNA|mRNA]].<br>3. [[RRNA|rRNA]] – ribosomal RNA <ref>Berg JM, Tymoczko JL and Stryer L, 2007, Biochemistry 6th edition, NY, W. H Freeman and Company, page 120</ref><br> - This is the RNA found in [[Ribosomes|ribosomes]]<br> - It acts as a catalyst for [[Proteins|protein]] synthesis<br> | ||
== References == | == References == | ||
<references /> | <references /> | ||
Revision as of 23:40, 9 January 2011
RNA stands for ribonucleic acid. RNA is made up of ribose, a five carbon sugar, and phosphate which forms the backbone. Attached to this backbone are 4 bases, in a similar way to DNA where cytosine (C) pairs with guanine (G) and thymine (T) pairs with adenine (A), in RNA C pairs with G, but A pairs with uracil (U) instead of T [1].
RNA involved in gene expression
- DNA is transcribed into mRNA, therefore the mRNA and the DNA are complementary
- This mRNA is then used as a template for translation into a functioning protein
- mRNA is also used to make copy DNA (cDNA)
2. tRNA – transfer RNA [3]
- consists of a sequence of three bases and an associated amino acid
- This molecule travels to the ribosome where a polypeptide is formed, the sequence of which was determined by the mRNA.
3. rRNA – ribosomal RNA [4]
- This is the RNA found in ribosomes
- It acts as a catalyst for protein synthesis
References
- ↑ Berg JM, Tymoczko JL and Stryer L, 2007, Biochemistry 6th edition, NY, W. H Freeman and Company, page 109
- ↑ Berg JM, Tymoczko JL and Stryer L, 2007, Biochemistry 6th edition, NY, W. H Freeman and Company, page 119
- ↑ Berg JM, Tymoczko JL and Stryer L, 2007, Biochemistry 6th edition, NY, W. H Freeman and Company, page 120
- ↑ Berg JM, Tymoczko JL and Stryer L, 2007, Biochemistry 6th edition, NY, W. H Freeman and Company, page 120