Transcription Factors: Activators and Repressors
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Questions and Answers

What is the role of positive regulators in transcription?

  • Block transcription of the gene affected
  • Increase stability of RNA pol to promoter and allow more effective binding (correct)
  • Physically alter the ability of RNA pol to bind to promoter
  • Tell where RNA pol should bind

    • How do negative regulators affect transcription?

  • Increase stability of RNA pol to promoter and allow more effective binding
  • Block transcription of the gene affected
  • Tell where RNA pol should bind
  • Physically alter the ability of RNA pol to bind to promoter (correct)

    • What characteristic pattern of growth did Jacob and Monod observe when E. Coli was grown in the presence of lactose and glucose?

  • Linear growth pattern
  • Diauxic growth pattern (correct)
  • Logarithmic growth pattern
  • Exponential growth pattern

    • What enzyme is required for the catabolism of lactose?

    <p>$eta$-galactosidase</p> Signup and view all the answers

    During which phase of growth does glucose get used while lactose is not used at all?

    <p>First logarithmic phase (phase 1)</p> Signup and view all the answers

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