RNA_Supplement_BIOL1010

RNA_Supplement_BIOL1010 - RNA Supplement At this point in...

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RNA Supplement
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At this point in your careers, you have only been exposed to RNA as mRNA, tRNA, and rRNA. However, RNA is involved in many other process.
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RNA transcription can be regulated (on/off – although there usually is some “leaky” transcription) or it can be constituitive (on all the time). Also, some genes are transcribed at higher rates than others.
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Single stranded RNA is less stable than DNA
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But RNA can make double stranded structures (normally within the same chain – foldback) however, the presence of the 2’OH creates a little different helix than that observed in DNA.
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Secondary structures of RNA
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Tertiary Structures of RNA
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Recognition of promoters in bacteria (like E. coli )
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E.coli promoter sequences – note “Conservation”
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recognizes promoters on either strand and will go in the direction indicated. We present DNA sequences in a 5’ -3’ direction.
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This note was uploaded on 04/06/2012 for the course BIOL BIOL 1010 taught by Professor Comptonw during the Winter '09 term at York University.

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RNA_Supplement_BIOL1010 - RNA Supplement At this point in...

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