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content/Biokemi/Gamla tentor/2022-01-29/13.md
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content/Biokemi/Gamla tentor/2022-01-29/13.md
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date: 2022-01-29
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tags:
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- biokemi
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- provfråga
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- kontroll-av-genuttryck-i-prokaryoter
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---
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Which protein is often required to initiate transcription by a bacterial RNA polymerase? How does it mediate initiation?/Vilket protein behövs ofta för att initiera transkription av bakteriellt RNA-polymeras? Hur underlättar det initieringen? (2p) Denna fråga kan besvaras på svenska eller engelska.
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**Svar**
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```spoiler-block
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Proteinet CAP behövs för att binda in cAMP för att aktivera RNA-polymeraset, så att det sedan kan hitta fram till promotorn och där starta transkriptionen.
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```
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