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MCQs

Total Questions : 241 | Page 5 of 25 pages
Question 41. Process by which virus transfer gene from one cell to another, called as
  1.    Replication
  2.    Transfer
  3.    Translation
  4.    Transduction
 Discuss Question
Answer: Option D. -> Transduction
Answer: (d).Transduction
Question 42. First step of 'viral replication' cycle is
  1.    Attachment
  2.    Penetration
  3.    Uncoating of viral genome
  4.    Doubling
 Discuss Question
Answer: Option A. -> Attachment
Answer: (a).Attachment
Question 43. When exchange of segment between viruses having segmented genome, process is known as
  1.    Recombination
  2.    Transfer
  3.    Translation
  4.    Reassortment
 Discuss Question
Answer: Option D. -> Reassortment
Answer: (d).Reassortment
Question 44. Site of attachment of 'rabies' virus is
  1.    Acetylcholine receptor
  2.    CD4 proteins on T lymphocytes
  3.    Fibroblast receptor
  4.    Wall receptor
 Discuss Question
Answer: Option A. -> Acetylcholine receptor
Answer: (a).Acetylcholine receptor
Question 45. In therapeutic process, nucleic acid is delivered in patient's cell as a drug to recover a disease, process is known as
  1.    Drug therapy
  2.    Physiotherapy
  3.    Gene therapy
  4.    Chemotherapy
 Discuss Question
Answer: Option C. -> Gene therapy
Answer: (c).Gene therapy
Question 46. Proofreading activity to maintain the fidelity of DNA synthesis
  1.    occurs after the synthesis has been completed
  2.    is a function of the 3'-5' exonuclease activity of the DNA polymerases
  3.    requires the presence of an enzyme separate from the DNA polymerases
  4.    occurs in prokaryotes but not eukaryotes
 Discuss Question
Answer: Option B. -> is a function of the 3'-5' exonuclease activity of the DNA polymerases
Answer: (b).is a function of the 3'-5' exonuclease activity of the DNA polymerases
Question 47. Why Deinococcus radiodurans is able to survive massive exposure to radiation?
  1.    Because it produces a thick shell which acts as a shield from the radiation
  2.    Because it has unique DNA repair mechanisms
  3.    Because its cellwall contains radioactive elements
  4.    Because it has many copies of genes encoding DNA repair
 Discuss Question
Answer: Option D. -> Because it has many copies of genes encoding DNA repair
Answer: (d).Because it has many copies of genes encoding DNA repair
Question 48. Both strands of DNA serve as templates concurrently in
  1.    replication
  2.    excision repair
  3.    mismatch repair
  4.    none of these
 Discuss Question
Answer: Option A. -> replication
Answer: (a).replication
Question 49. Which of the following repairs nicked DNA by forming a phosphodiester bond between adjacent nucleotides?
  1.    Helicase
  2.    DNA gyrase
  3.    Topoisomerases
  4.    DNA ligase
 Discuss Question
Answer: Option D. -> DNA ligase
Answer: (d).DNA ligase
Question 50. The enzyme that catalyzes the synthesis of DNA is called
  1.    DNA polymerase
  2.    DNA gyrase
  3.    DNA ligase
  4.    helicase
 Discuss Question
Answer: Option A. -> DNA polymerase
Answer: (a).DNA polymerase

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