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MCQs

Total Questions : 47 | Page 4 of 5 pages
Question 31.  Transcription factors are
  1.    regions of DNA in the promoter area
  2.    regions of DNA in the enhancer area
  3.    any protein which binds to DNA
  4.    proteins which bind DNAand initiate transcription
 Discuss Question
Answer: Option D. -> proteins which bind DNAand initiate transcription
Question 32.  Tubulin is regulated by
  1.    binding of tubulin to tubulin mRNA
  2.    splicing of the tubulin transcript
  3.    binding of tubulin to the tubulin translational product
  4.    binding of tubulin to DNA
 Discuss Question
Answer: Option C. -> binding of tubulin to the tubulin translational product
Question 33. . Genes which need to be coordinately regulated but are not in operons may be regulated by
  1.    common transcription factor binding domains
  2.    TATA boxes
  3.    CAAT regions
  4.    GC regions
 Discuss Question
Answer: Option A. -> common transcription factor binding domains
Question 34. . Which of the following is not a transcription factor?
  1.    Helix-turn-helix proteins
  2.    Zinc finger proteins
  3.    Leucine zipper proteins
  4.    Steroid hormones
 Discuss Question
Answer: Option D. -> Steroid hormones
Question 35. . Enhancers differ from promoters in that
  1.    they initiate transcription
  2.    they are adjacent to the start codon
  3.    their orientation can be inverted without effect
  4.    they are restricted to a specific gene
 Discuss Question
Answer: Option C. -> their orientation can be inverted without effect
Question 36. . Sex determination in Drosophila involves
  1.    alternate splicing
  2.    methylation
  3.    gene amplification
  4.    none of these
 Discuss Question
Answer: Option A. -> alternate splicing
Question 37. . Methylated gene are
  1.    active
  2.    silent
  3.    dynamic
  4.    either (a) or (b)
 Discuss Question
Answer: Option B. -> silent
Question 38. . Which of the following occur in the presence of glucose?
  1.    lac Z gene expression is increased
  2.    cAMP increases
  3.    Binding of CAP-cAMP complex to the promoter area decreases
  4.    none of the above
 Discuss Question
Answer: Option C. -> Binding of CAP-cAMP complex to the promoter area decreases
Question 39. . Sex hormones activate transcription of specific genes by
  1.    binding to a transcription factor
  2.    binding to RNA polymerase
  3.    binding to DNA enhancer region
  4.    binding to DNA promoter region
 Discuss Question
Answer: Option A. -> binding to a transcription factor
Question 40. . The lac operon is translated into __________ proteins.
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option C. -> 3

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