Transcription regulation

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1. Coordinate regulation results from control of the synthesis of one or more ___________ mRNA molecules encoding all of the gene products that function in that pathway

  • Polycistronic
  • Duocistronic
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2. In positive regulation, the default state is ____

  • Off
  • On

3. When an inducer binds to the lac repressor _____________

  • Inactivation of the repressor so it can no longer bind to the operon
  • Activation of the repressor so it can bind to the operon

4. When lactose is added to the cell's surroundings, the lac repressor is inactivated and ___________

  • Transcription of the lac enzymes can go ahead
  • Transcription of the lac enzymes is silenced

5. The inducer of the lac repressor is

  • Allolactose (lactose isomer)
  • Beta Galactosidase


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