Multiple Choice Questions

If a set of genes is induced in the presence of the controlling substance, it is referred to as __________ control.
  • operator
  • ppGpp
  • positive
  • promoter
____________ is used to measure the amount of a chemoattractant encountered over time.
  • Attenuation
  • Methylation
  • operator
  • autoinduction
When there is no arabinose available in the environment, the AraC protein acts as a(n) ______________ for the E. coli ara operon.
  • bends the DNA.
  • activator or inducer
  • repressor
  • AT-rich; more stable
In order for high level expression of the E. coli lac operon to occur, a complex of catabolite activator protein and __________ must be bound to the DNA near the promoter.
  • cAMP or cyclic AMP
  • All of the choices are correct.
  • CheA autophosphorylates
  • AT-rich; more stable
If a set of genes is repressed in the presence of the controlling substance, it is referred to as __________ control.
  • Attenuation
  • regulon
  • zinc finger
  • negative
A collection of genes or operons controlled by a common regulatory protein is called a(n) ___________ .
  • regulon
  • promoter
  • positive
  • negative
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Multiple Choice Questions
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