Study Guide, Chapter 18

Study Guide, Chapter 18 - BSCI105 Freshman Connection Fall...

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BSCI105, Freshman Connection Fall 2010 Study Guide #1 5 I. Prokaryotic Gene Regulation Vocabulary: Effector Repressor Activator Co-repressor Inducer Operon Repressible Inducible Operator Promoter Key Concept 1: "Gene expression," or levels of protein in a cell, is mostly regulated at the transcriptional level in prokaryotes, but can also be regulated at transcriptional and post-transcriptional levels. Key Concept 2: Transcriptional regulation is used by prokaryotes to control alternate metabolic pathways, primarily through negative regulation using repressor molecules to turn off transcription. Key Concept 3: Several genes in the same metabolic pathway may be regulated together through a single promoter using operons. Key Concept 4: Repressible operons are normally "on," making mRNA, but are turned off by a specific repressor in the presence of a co-repressor (for example, the trp operon). Key Concept 5: Inducible operons are normally "off," but are activated and make mRNA in
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This note was uploaded on 12/08/2011 for the course BSCI 105 taught by Professor Jensen during the Fall '07 term at Maryland.

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Study Guide, Chapter 18 - BSCI105 Freshman Connection Fall...

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