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Total Questions : 119 | Page 6 of 12 pages
Question 51. Each IgA antibody molecule consists of
  1.    four polypeptide chain and has two antigen binding site
  2.    two polypeptide chain and has one antigen binding site
  3.    three polypeptide chain and has two antigen binding site
  4.    two polypeptide chain and has two antigen binding site
 Discuss Question
Answer: Option A. -> four polypeptide chain and has two antigen binding site
Answer: (a).four polypeptide chain and has two antigen binding site
Question 52. Monoclonal antibodies were first produced by
  1.    Georges Kohler and Cesar Milstein
  2.    Sarkar and Sommer
  3.    Selman Waksman
  4.    Edward Jenner and Louis Pasteur
 Discuss Question
Answer: Option A. -> Georges Kohler and Cesar Milstein
Answer: (a).Georges Kohler and Cesar Milstein
Question 53. Antibodies in the human immune system can identify approximately 108 different molecules Which one of the following is correct?
  1.    This diversity is generated from 108 different immunoglobin genes
  2.    Many of these molecules are self-antigens
  3.    Most of these antibodies recognize proteins
  4.    Most of these antibodies recognize small organic molecules
 Discuss Question
Answer: Option C. -> Most of these antibodies recognize proteins
Answer: (c).Most of these antibodies recognize proteins
Question 54. A polyclonal antibody response
  1.    is produced only in response to polymeric antigens
  2.    is produced by several B cells recognizing different pitopes on the same antigen
  3.    occurs during the lag phase of the immune response
  4.    violates clonal selection
 Discuss Question
Answer: Option B. -> is produced by several B cells recognizing different pitopes on the same antigen
Answer: (b).is produced by several B cells recognizing different pitopes on the same antigen
Question 55. During the lag period between antigen contact and detection of adaptive immunity,
  1.    antigen is hidden from the immune system in macrophages
  2.    innate immune effectors are eliminating antigen
  3.    innate immunity blocks the activation of adaptive immune effector cells
  4.    new B and T cells with the appropriate antigen specificity must be produced in the bone marrow
 Discuss Question
Answer: Option B. -> innate immune effectors are eliminating antigen
Answer: (b).innate immune effectors are eliminating antigen
Question 56. Lymphocytes are activated by antigen in the
  1.    blood stream
  2.    bone marrow
  3.    liver
  4.    lymph nodes
 Discuss Question
Answer: Option D. -> lymph nodes
Answer: (d).lymph nodes
Question 57. A virus vaccine that can activate cytotoxic T cells must contain
  1.    a high dose of virus particles
  2.    an adjuvant to stimulate T cell division
  3.    live virus
  4.    virus peptides
 Discuss Question
Answer: Option C. -> live virus
Answer: (c).live virus
Question 58. The ability of an antigen to induce an immune response does not depend on the antigen's
  1.    ability to enter the thyroid
  2.    degree of aggregation
  3.    dose
  4.    size
 Discuss Question
Answer: Option A. -> ability to enter the thyroid
Answer: (a).ability to enter the thyroid
Question 59. A pathogen can be a (n)
  1.    agent that causes a disease
  2.    virus
  3.    bacteria
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Answer: (d).All of these
Question 60. CD antigens
  1.    allow leukocytes to recognize antigen
  2.    are each expressed on only one cell type
  3.    are expressed on immune cells to mark them for separation
  4.    function as receptors for cytokine and CAMs
 Discuss Question
Answer: Option D. -> function as receptors for cytokine and CAMs
Answer: (d).function as receptors for cytokine and CAMs

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