MCQ Questions
Q.1.
If a set of genes is induced in the presence of the controlling substance, it is referred to as __________ control.
  • 0%
    operator
  • 0%
    ppGpp
  • 0%
    positive
  • 0%
    promoter
Q.2.
____________ is used to measure the amount of a chemoattractant encountered over time.
  • 0%
    Attenuation
  • 0%
    Methylation
  • 0%
    operator
  • 0%
    autoinduction
Q.3.
When there is no arabinose available in the environment, the AraC protein acts as a(n) ______________ for the E. coli ara operon.
  • 0%
    bends the DNA.
  • 0%
    activator or inducer
  • 0%
    repressor
  • 0%
    AT-rich; more stable
Q.4.
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.
  • 0%
    cAMP or cyclic AMP
  • 0%
    All of the choices are correct.
  • 0%
    CheA autophosphorylates
  • 0%
    AT-rich; more stable
Q.5.
If a set of genes is repressed in the presence of the controlling substance, it is referred to as __________ control.
  • 0%
    Attenuation
  • 0%
    regulon
  • 0%
    zinc finger
  • 0%
    negative
Q.6.
A collection of genes or operons controlled by a common regulatory protein is called a(n) ___________ .
  • 0%
    regulon
  • 0%
    promoter
  • 0%
    positive
  • 0%
    negative