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MCQs

Total Questions : 241 | Page 6 of 25 pages
Question 51. If viral 'DNA' integrates in host cell chromosomes, with no progeny production, process is called
  1.    Lytic cycle
  2.    Lysogenic cycle
  3.    Replicative cycle
  4.    Translational cycle
 Discuss Question
Answer: Option B. -> Lysogenic cycle
Answer: (b).Lysogenic cycle
Question 52. Which 'DNA' does not have a double strand DNA ?
  1.    Poxviruses
  2.    Parvoviruses
  3.    HIV
  4.    HCV
 Discuss Question
Answer: Option B. -> Parvoviruses
Answer: (b).Parvoviruses
Question 53. If a cell has acquired new character as a result of integrated prophage, process is called as
  1.    Lytic cycle
  2.    Lysogenic cycle
  3.    Lysogenic conversion
  4.    Replication
 Discuss Question
Answer: Option C. -> Lysogenic conversion
Answer: (c).Lysogenic conversion
Question 54. Process, one or both viruses infect cells, having mutation and produced nonfictional protein, called as
  1.    Recombination
  2.    Reassortment
  3.    Complementation
  4.    Transduction
 Discuss Question
Answer: Option C. -> Complementation
Answer: (c).Complementation
Question 55. After completion of a viral replication cycle number of progeny in host cell is, approximately
  1.    100 virion
  2.    200 virion
  3.    50 virion
  4.    40 virion
 Discuss Question
Answer: Option A. -> 100 virion
Answer: (a).100 virion
Question 56. Advantageous mutation can help increase in
  1.    resistance to diseases
  2.    point mutation
  3.    number of amino acids
  4.    gene expression
 Discuss Question
Answer: Option A. -> resistance to diseases
Answer: (a).resistance to diseases
Question 57. The mutations which are harmful to the fitness of organism are called as
  1.    advantageous mutation
  2.    deleterious mutation
  3.    silent mutation
  4.    nonsense mutation
 Discuss Question
Answer: Option B. -> deleterious mutation
Answer: (b).deleterious mutation
Question 58. The synthesis of DNA by DNA polymerase occurs in the
  1.    3' to 5' direction
  2.    5' to 5' direction
  3.    5' to 3' direction
  4.    3' to 3' direction
 Discuss Question
Answer: Option C. -> 5' to 3' direction
Answer: (c).5' to 3' direction
Question 59. Site in the ribosome from which the tRNA donates amino acids to the growing polypeptide chain is
  1.    P site
  2.    O site
  3.    T site
  4.    A site
 Discuss Question
Answer: Option A. -> P site
Answer: (a).P site
Question 60. Which binding is inhibited by pactamycin?
  1.    Aminoacyl-tRNA to the A-site of 30S subunit
  2.    Initiator-tRNA to 30S/40S initiation complexes
  3.    Peptidyl t-RNA to the 50S subunit
  4.    Formation of peptide bond in P site
 Discuss Question
Answer: Option B. -> Initiator-tRNA to 30S/40S initiation complexes
Answer: (b).Initiator-tRNA to 30S/40S initiation complexes

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