lecture - cha 10 -student

lecture - cha 10 -student - CHAPTER 10 Regulation of Gene...

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CHAPTER 10 Regulation of Gene Expression in Bacteria and Their Viruses Copyright 2008 © W H Freeman and Company
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1. In what ways do the levels of gene transcription and RNA translation vary? 2. How do cells or viruses sense environmental changes and trigger changes in gene expression? 3. What are the molecular mechanisms of gene regulation in bacteria and their viruses? 4. How is the expression of sets of genes coordinated? Key Questions
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Regulation: recognize environmental conditions; in response, switch on/off the transcription of gene(s) Genetic switches: regulatory proteins and their binding sites.
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10.1 Gene Regulation The basics of prokaryotic transcriptional regulation: DNA-protein interactions --- transcription Where? Ok to start? Ok to start?
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Which statement about genetic switches is incorrect? a.The regulatory proteins, and the DNA sequences they bind to constitute genetic switches. b.The promoter, operator, activator binding site, repressor, and activator constitute genetic switches. c.The promoter, operator, activator, and the DNA sequences they bind to constitute genetic switches. d. They are all correct.
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Two sates of regulatory proteins:
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lecture - cha 10 -student - CHAPTER 10 Regulation of Gene...

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