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MCQs

Total Questions : 77 | Page 8 of 8 pages
Question 71. CDNA is produced from
  1.    tRNA
  2.    mRNA
  3.    protein chain
  4.    DNA
 Discuss Question
Answer: Option B. -> mRNA
Answer: (b).mRNA
Question 72. The tail which distinguishes mRNA from tRNA and rRNA is
  1.    poly C-tail
  2.    poly B-tail
  3.    poly Z-tail
  4.    poly A-tail
 Discuss Question
Answer: Option D. -> poly A-tail
Answer: (d).poly A-tail
Question 73. Termination codon is required for stopping high levels of transcription of other regions such as _______ which might interfere with ___________ of the vector.
  1.    origin, replication
  2.    end, replication
  3.    end, stability
  4.    origin, stability
 Discuss Question
Answer: Option D. -> origin, stability
Answer: (d).origin, stability
Question 74. In fusion proteins, the reading frame in a vector is out of phase with the insert.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 75. Lambda PL promoter is used in which vectors?
  1.    Cloning vectors
  2.    Expression vectors
  3.    Both cloning and expression vectors
  4.    Bacteriophage Mu
 Discuss Question
Answer: Option B. -> Expression vectors
Answer: (b).Expression vectors
Question 76. The promoter can be controlled by a repressor which is temperature sensitive.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 77. Some vectors carry a mutant form of promoter known as lacUV5 promoter. It carries ______ in the promoter region and _____ the efficiency.
  1.    point mutations, decreases
  2.    point mutations, increases
  3.    frameshift mutations, increases
  4.    frameshift mutations, increases
 Discuss Question
Answer: Option B. -> point mutations, increases
Answer: (b).point mutations, increases

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