13_outline_transcription_translation

13_outline_transcription_translation -...

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Transcription/Translation/Protein Secretion Bio119 I. Transcription A. Many bacterial genes are arranged in operons 1. 2. They are transcribed together 3. An operon of genes shares a: 4. This increases efficiency in gene expression and regulation of a particular pathway. B. During transcription, genes are copied into RNA C. Most bacterial messenger RNAs (mRNA) encode for specific proteins 1. RNA’s can also be catalytic, structural, regulatory, or unknown. D. Most bacterial mRNA’s: E. Bacterial mRNAs are short-lived Page 1
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Transcription/Translation/Protein Secretion Bio119 F. Steps in RNA synthesis (13.9): 1. Initiation: a) RNA polymerase binds to: b) c) RNA polymerase holoenzyme: d) This is dependent on: 2. Promoter clearance: a) 3. Elongation: a) Core RNA polymerase (4 subunits, no sigma factor) takes over polymerization of nucleotides into RNA. b) Only moves in one direction 4. Termination: Page 2
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Transcription/Translation/Protein Secretion Bio119 a) RNA polymerase terminates transcription in response
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13_outline_transcription_translation -...

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