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9 Cards in this Set
- Front
- Back
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What are the 3 main steps?
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1. Copy 2. Edit 3. Carry
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Where does transcription occur?
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Nucleus
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RNA polymerase moves in what direction?
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3' to 5' (forms a 5' to 3' mRNA strand)
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What portion of pre-mRNA codes for proteins?
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exons
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When does enzyme induction occur?
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high substrate concentration - signals to transcribe the gene that makes needed enzyme
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Will transcription occur when a repressor binds to the control site?
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No - this blocks mRNA synthesis by RNA polymerase
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Will transcription occur when an inducer binds to the repressor protein?
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Yes - this removes the repressor from the control site, allowing RNA polymerase to synthesize the needed enzyme
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How is the lactose operon turned off in E. Coli that grow on lactose
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Low levels of lactose - repressor protein binds to control site and blocks transcription
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Which strand is the antisense strand?
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The 3' to 5' DNA template strand that mRNA is synthesized off of
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