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MCQs

Total Questions : 348 | Page 2 of 35 pages
Question 11. What is blocking of gene expression by siRNAs called?
  1.    gene regulation
  2.    RNA interference
  3.    RNA control
  4.    rRNA regulation
 Discuss Question
Answer: Option B. -> RNA interference
Answer: (b).RNA interference
Question 12. A region within a single promoter that works for multiple genes is called
  1.    regulator
  2.    operator
  3.    initiator
  4.    Polypromoter
 Discuss Question
Answer: Option B. -> operator
Answer: (b).operator
Question 13. Which of following is an example of a repressive operon?
  1.    lac
  2.    l arabinose
  3.    mac
  4.    trp
 Discuss Question
Answer: Option D. -> trp
Answer: (d).trp
Question 14. How do bacteria often respond to environmental change?
  1.    self destruction
  2.    stopping replication
  3.    regulating transcription
  4.    regulating translation
 Discuss Question
Answer: Option C. -> regulating transcription
Answer: (c).regulating transcription
Question 15. When was massive study of entire human genome completed?
  1.    2011
  2.    2005
  3.    2012
  4.    2009
 Discuss Question
Answer: Option C. -> 2012
Answer: (c).2012
Question 16. P53 is an example of which of following?
  1.    tumor suppressor genes
  2.    cancer repressor genes
  3.    proto oncogenes
  4.    oncogenes
 Discuss Question
Answer: Option A. -> tumor suppressor genes
Answer: (a).tumor suppressor genes
Question 17. A single-stranded miRNA is composed of approximately how many nucleotides?
  1.    10
  2.    13
  3.    100
  4.    22
 Discuss Question
Answer: Option D. -> 22
Answer: (d).22
Question 18. Process by which cells become specialized in structure and function is called
  1.    metamorphosis
  2.    differentiation
  3.    translation
  4.    recombination
 Discuss Question
Answer: Option B. -> differentiation
Answer: (b).differentiation
Question 19. Movement of gene from one locus to another is called
  1.    oncogenes
  2.    Virogenes
  3.    homeotic genes
  4.    transposons
 Discuss Question
Answer: Option D. -> transposons
Answer: (d).transposons
Question 20. Which of following is acquired by newly synthesized proteins of cell membrane?
  1.    smaller peptides
  2.    sugars
  3.    tags
  4.    complex carbohydrate chains
 Discuss Question
Answer: Option B. -> sugars
Answer: (b).sugars

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