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MCQs

Total Questions : 189 | Page 3 of 19 pages
Question 21. Cis-acting sites should be present in the vector for ________
  1.    replication
  2.    selecting recombinants by acting as a marker
  3.    transposition
  4.    providing high copy number
 Discuss Question
Answer: Option C. -> transposition
Answer: (c).transposition
Question 22. Rosy gene is used as a selectable marker for transformation in Drosophila, it produces an enzyme required for the synthesis of ____________
  1.    wing pigment
  2.    eye pigment
  3.    both eye and wing pigment
  4.    thorax pigment
 Discuss Question
Answer: Option B. -> eye pigment
Answer: (b).eye pigment
Question 23. Wild type flies have crimson red eyes whereas rosy mutant have brick-red eyes.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 24. Wild-type Drosophila flies are _____ to ethanol supplied in food.
  1.    resistant
  2.    non-resistant
  3.    resistant at low concentration and non-resistant at higher concentration
  4.    resistant at higher concentrations and non-resistant at lower concentration
 Discuss Question
Answer: Option A. -> resistant
Answer: (a).resistant
Question 25. Only the _____ part of Drosophila is transgenic and the rest is not. This is known as ______
  1.    germline cell, mosaic
  2.    nurse cells, mosaic
  3.    germline cells, hybrid
  4.    nurse cells, hybrid
 Discuss Question
Answer: Option A. -> germline cell, mosaic
Answer: (a).germline cell, mosaic
Question 26. In ___________ cells, virus replication doesn’t take place and viral DNA ___________
  1.    non-permissive, is also not expressed
  2.    permissive, is also not expressed
  3.    non-permissive, can be expressed
  4.    non-permissive, is always expressed
 Discuss Question
Answer: Option C. -> non-permissive, can be expressed
Answer: (c).non-permissive, can be expressed
Question 27. T protein is required for replication. It is a product of ____________
  1.    delayed early transcription
  2.    late transcription
  3.    early transcription
  4.    both early and late replication
 Discuss Question
Answer: Option C. -> early transcription
Answer: (c).early transcription
Question 28. Splicing of the transcripts is necessary for efficient expression.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 29. SV40 is a virus and it produces how many transcripts?
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2
Question 30. Vaccinia virus is a commonly used virus and it is a member of pox virus family. It has a large genome of _____________ and can accept at least ____________ of foreign DNA.
  1.    200kb, 25kb
  2.    1000kb, 200kb
  3.    500kb, 50kb
  4.    800kb, 100kb
 Discuss Question
Answer: Option A. -> 200kb, 25kb
Answer: (a).200kb, 25kb

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