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Home Biochemistry Genetic Regulation Prokaryotes Comments

  • Question
  • Which of the following is not part of the lac operon?


  • Options
  • A. I
  • B. O
  • C. P
  • D. none of these

  • Correct Answer



  • Genetic Regulation Prokaryotes problems


    Search Results


    • 1. A mutation in the tip binding site of the repressor would result in

    • Options
    • A. constitutive trp operon expression
    • B. inducible trp operon expression
    • C. no operon expression
    • D. none of the above
    • Discuss
    • 2. Methylated gene are

    • Options
    • A. active
    • B. silent
    • C. dynamic
    • D. either (a) or (b)
    • Discuss
    • 3. The first protein complex to bind to the TATA box is

    • Options
    • A. transcription factor IIA
    • B. transcription factor IIB
    • C. transcription factor IID
    • D. all of these
    • Discuss
    • 4. Protein folding is

    • Options
    • A. automatic, mediated by the protein itself
    • B. mediated by other proteins called chaperones
    • C. mediated by the ribosomes
    • D. none of the above
    • Discuss
    • 5. Signal sequences are part of a protein that

    • Options
    • A. signal folding of the protein
    • B. signal the protein synthesis on the ribosomes is ended
    • C. transport proteins to other sites within the cell
    • D. refold proteins in prion-associated diseases
    • Discuss
    • 6. What are genes?

    • Options
    • A. The functional unit of inheritance
    • B. A fragment of DNA
    • C. A portion of a chromosome
    • D. All of the above
    • Discuss
    • 7. Sex lethal (sxl) in Drosophila is transcribed when

    • Options
    • A. the X autosome balance is less than 0.5
    • B. the X autosome balance is 1 or greater
    • C. the X autosome balance equals 0.5
    • D. none of the above
    • Discuss
    • 8. Why are several structural genes regulated as a unit in bacteria?

    • Options
    • A. An accident of evolution
    • B. It allows coordinating regulation of genes with a common function
    • C. The bacteria chromosome is so small; many different genes must be controlled by the same promoter
    • D. none of the above
    • Discuss
    • 9. Transcription factors are

    • Options
    • A. regions of DNA in the promoter area
    • B. regions of DNA in the enhancer area
    • C. any protein which binds to DNA
    • D. proteins which bind DNAand initiate transcription
    • Discuss
    • 10. Sex determination in Drosophila involves

    • Options
    • A. alternate splicing
    • B. methylation
    • C. gene amplification
    • D. none of these
    • Discuss


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