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MCQs

Total Questions : 31 | Page 2 of 4 pages
Question 11. __________ is specifically able to have a long-term relationship with the host known as lysogeny.
  1.    Temperate virus
  2.    RNA phage
  3.    DNA phage
  4.    Adsorbed virus
 Discuss Question
Answer: Option A. -> Temperate virus
Question 12. A bacterial defense mechanism against bacteriophage is called
  1.    polymerization
  2.    concatamerization
  3.    lysogeny
  4.    restriction
 Discuss Question
Answer: Option D. -> restriction
Question 13. The filamentous bacteriopohage infect male E. coli cells by attaching to
  1.    the cell membrane
  2.    the cell wall
  3.    lipopolysaccharide
  4.    the tip of the pilus
 Discuss Question
Answer: Option D. -> the tip of the pilus
Question 14. Which of the following properties is due to lysogenic conversion by phages?
  1.    Toxin production in Clostridium botulinum types C and D
  2.    Toxin production in Corynebacterium diphtheriae
  3.    Antigenic variation in Salmonella anatum
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 15. T-even phage binding to E. coli probably involves
  1.    all of these
  2.    electrostatic interaction
  3.    hydrophobic interaction
  4.    covalent bonds
 Discuss Question
Answer: Option B. -> electrostatic interaction
Question 16.  The process by which phage reproduction is initiated in lysogenized culture is called
  1.    infection
  2.    integration
  3.    repression
  4.    induction
 Discuss Question
Answer: Option D. -> induction
Question 17.  Which capsid symmetry is exhibited by most of the phages?
  1.    Helical
  2.    Icosahedral
  3.    Complex
  4.    None of these
 Discuss Question
Answer: Option B. -> Icosahedral
Question 18.  Area of lysis on a bacterial lawn culture produced by a phage is known as
  1.    pock
  2.    plaque
  3.    pox
  4.    all of these
 Discuss Question
Answer: Option B. -> plaque
Question 19.  The procapsid is assembled with the aid of __________ proteins.
  1.    ladder
  2.    framing
  3.    scaffolding
  4.    form
 Discuss Question
Answer: Option C. -> scaffolding
Question 20.  Which of the following is/are synthesized from late mRNA?
  1.    Phage structural proteins
  2.    Proteins that help with phage assembly without becoming part of the virion structure
  3.    Proteins involved in cell lysis and phage release
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above

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