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Genetic Regulation Prokaryotes problems


  • 1. 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
  • 2. Methylated gene are

  • Options
  • A. active
  • B. silent
  • C. dynamic
  • D. either (a) or (b)
  • Discuss
  • 3. 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
  • 4. Which of the following is not part of the lac operon?

  • Options
  • A. I
  • B. O
  • C. P
  • D. none of these
  • Discuss
  • 5. 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
  • 6. 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
  • 7. 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
  • 8. 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
  • 9. Sex determination in Drosophila involves

  • Options
  • A. alternate splicing
  • B. methylation
  • C. gene amplification
  • D. none of these
  • Discuss
  • 10. Alternate splicing of RNA transcripts is a mechanism to regulate

  • Options
  • A. tubulin
  • B. tachykinins
  • C. DNA methylation
  • D. leucine zippers
  • Discuss

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