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AP Ch Quiz Ch 16 Gene Regulation

9 Questions
AP Chemistry Quizzes & Trivia

Ch 16 Gene Regulation

Questions and Answers
  • 1. 
    Which statement is NOT correct about the lac operon?
    • A. 

      It regulates the production of a series of five enzymes.

    • B. 

      It is normally turned off if glucose is present.

    • C. 

      Lactose binds to the repressor protein and inactivates it.

    • D. 

      It is an inducible system.

    • E. 

      The structural genes make products that allow lactose metabolism.

  • 2. 
    Which statement is NOT correct about the trp operon?
    • A. 

      The structural genes make products that act in a metabolic pathway to produce tryptophan.

    • B. 

      It is normally turned off if tryptophan is present.

    • C. 

      Tryptophan acts as the corepressor.

    • D. 

      The regulator gene product is inactive by itself.

    • E. 

      Tryptophan binds to the repressor protein and inactivates it.

  • 3. 
    Which level of primary control in eukaryotic gene activity involves the life span of the mRNA molecule and the ability of the mRNA to bind to ribosomes?
    • A. 

      Feedback control

    • B. 

      Translational control

    • C. 

      Transcriptional control

    • D. 

      Posttranscriptional control

    • E. 

      Posttranslational control

  • 4. 
    Which level of primary control in eukaryotic gene activity involves processing early RNA transcripts to mRNA and control of the rate at which mRNA leaves the nucleus?
    • A. 

      Feedback control

    • B. 

      Translational control

    • C. 

      Transcriptional control

    • D. 

      Posttranscriptional control

    • E. 

      Posttranslational control

  • 5. 
    • A. 

      Feedback control

    • B. 

      Translational control

    • C. 

      Transcriptional control

    • D. 

      Posttranscriptional control

    • E. 

      Posttranslational control

  • 6. 
    An enhancer site is
    • A. 

      Part of an operon.

    • B. 

      Found only in prokaryotes.

    • C. 

      Located at a distance from the gene it affects.

    • D. 

      An attachment site for RNA polymerase.

  • 7. 
    "Jumping genes" that have the ability to move within and between chromosomes are called
    • A. 

      Introns.

    • B. 

      Oncogenes.

    • C. 

      Transposons.

    • D. 

      Retroviruses.

    • E. 

      Exons.

  • 8. 
    An oncogene is
    • A. 

      A viral gene with no relation to the host cell's genes.

    • B. 

      A mutated form of a proto-oncogene.

    • C. 

      A bacterial gene that causes cancer in the host.

    • D. 

      Always seen in human cancer cells.

    • E. 

      A gene that turns off cellular reproduction.

  • 9. 
    The balance between stimulatory signals and inhibitory signals determines whether
    • A. 

      A cell is normal or malignant.

    • B. 

      A cell conducts normal metabolism or undergoes apoptosis.

    • C. 

      Proto-oncogenes are active.

    • D. 

      Tumor-suppressor genes are active.

    • E. 

      Both C and D.

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