Quiz 1: Regulation Of Transcription In Prokaryote

10 Questions

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Quiz 1: Regulation Of Transcription In Prokaryote

Each question below contains five suggested responses. Please choose by clicking the one best response to each question. TOPICS: Regulation of Transcription in Prokaryote The QUIZ is for the SERIOUS STUDENTS only


Questions and Answers
  • 1. 
    A group of linked genes whose expression is coordinately regulated.
    • A. 

      Promoter

    • B. 

      Operon

    • C. 

      Regulator

    • D. 

      Operator

    • E. 

      Repressor

  • 2. 
    A mRNA molecule that yields two or more proteins.
    • A. 

      Promoter

    • B. 

      Operon

    • C. 

      Polycistronic

    • D. 

      Operator

    • E. 

      Regulator

  • 3. 
    Control of gene expression by preventing a gene from being expressed.
    • A. 

      Transcription

    • B. 

      Induction

    • C. 

      Translation

    • D. 

      Replication

    • E. 

      Repression

  • 4. 
    Region of an operon, close to the promoter, to which a repressor protein binds.
    • A. 

      Promoter

    • B. 

      Terminator

    • C. 

      Regulator

    • D. 

      Operator

    • E. 

      Repressor

  • 5. 
    DNA sequence(s) lying upstream from a gene, to which RNA polymerase binds.
    • A. 

      Promoter

    • B. 

      Operon

    • C. 

      Regulator

    • D. 

      Operator

    • E. 

      Repressor

  • 6. 
    Which of the following gene for beta-galactosidase.
    • A. 

      LacZ

    • B. 

      LacY

    • C. 

      LacA

    • D. 

      LacZY

    • E. 

      LacZYA

  • 7. 
    The trpE gene contains a 5’ untranslated region that plays an important role in the regulatory mechanism called ……………..
    • A. 

      Co-repression

    • B. 

      Operon

    • C. 

      Repression

    • D. 

      Expression

    • E. 

      Attenuation

  • 8. 
    The attenuator hairpin is the product of the base pairing of sequences ________
    • A. 

      1 and 4

    • B. 

      2 and 4

    • C. 

      3 and 4

    • D. 

      1 and 2

    • E. 

      1 and 3

  • 9. 
    Tryptophan, the end-product of the enzymes encoded by the trp operon, therefore acts as ________
    • A. 

      A promoter

    • B. 

      A co-repressor

    • C. 

      A repressor

    • D. 

      An inducer

    • E. 

      A terminator

  • 10. 
    A sugar, that is the true inducer of the lac operon.
    • A. 

      Monosacharide

    • B. 

      Lactose

    • C. 

      Galactose

    • D. 

      Glucose

    • E. 

      Allolactose