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MCQs

Total Questions : 105 | Page 6 of 11 pages
Question 51. The heavy and light chains of the antibodies are linked to one another by ____________________
  1.    covalent bonds
  2.    disulfide bonds
  3.    ionic bonds
  4.    hydrogen bonds
 Discuss Question
Answer: Option B. -> disulfide bonds
Answer: (b).disulfide bonds
Question 52. Which antibody is produced at high levels in response to parasitic functions?
  1.    IgA
  2.    IgE
  3.    IgG
  4.    IgD
 Discuss Question
Answer: Option B. -> IgE
Answer: (b).IgE
Question 53. Which is the first antibody secreted by B cells following stimulation by an antigen?
  1.    IgG
  2.    IgM
  3.    IgE
  4.    IgD
 Discuss Question
Answer: Option B. -> IgM
Answer: (b).IgM
Question 54. T-cells are activated by _______________
  1.    autoantibodies
  2.    antibodies
  3.    fragments of antigens
  4.    intact antigens
 Discuss Question
Answer: Option C. -> fragments of antigens
Answer: (c).fragments of antigens
Question 55. The dendritic cells were discovered by _______________
  1.    Ralph Steinman
  2.    Barry Marshall
  3.    David Baltimore
  4.    Peter Medawar
 Discuss Question
Answer: Option A. -> Ralph Steinman
Answer: (a).Ralph Steinman
Question 56. Each T-cell has a single species of T-cell receptor.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 57. The activation of T-cell by the dendritic cells is associated with __________________
  1.    increase in magnesium ions
  2.    decrease in magnesium ions
  3.    increase in calcium ions
  4.    decrease in calcium ions
 Discuss Question
Answer: Option C. -> increase in calcium ions
Answer: (c).increase in calcium ions
Question 58. T-cells secrete antibodies for eradicating the infected cells.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 59. After the clearance of foreign antigen, the expanded T-cell population ________________
  1.    dies by apoptosis
  2.    increases in size
  3.    remains in the circulatory system
  4.    remains in lymph nodes
 Discuss Question
Answer: Option A. -> dies by apoptosis
Answer: (a).dies by apoptosis
Question 60. Proliferation of T-cells in response to antigen presentation is accompanied by enlargement of __________________
  1.    lymph nodes
  2.    area of infection
  3.    size of antibody
  4.    size of B-cells
 Discuss Question
Answer: Option A. -> lymph nodes
Answer: (a).lymph nodes

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