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MCQs

Total Questions : 119 | Page 10 of 12 pages
Question 91. Which of the following are responsible for immune specificity?
  1.    Antigens
  2.    Antibodies
  3.    T lymphocytes
  4.    Macrophage
 Discuss Question
Answer: Option B. -> Antibodies
Answer: (b).Antibodies
Question 92. Which of the following immune cells would have an especially low count in a patient with advanced AIDS?
  1.    Helper T lymphocyte
  2.    Killer T lymphocytes
  3.    None of these
  4.    B lymphocytes
 Discuss Question
Answer: Option A. -> Helper T lymphocyte
Question 93. If a person is vaccinated against a disease sometime in the past, which of the following is currently in your body?
  1.    Memory B lymphocytes for the antigen of this disease organism
  2.    A very high level of antibodies against the disease antigens
  3.    The disease organism itself and antigens for the disease organism
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 94. In cellular immunity, T lymphocytes are responsible for the recognition and killing of foreign invaders. The cells are
  1.    both (a) and (b)
  2.    killer T cells
  3.    cytotoxic T lymphocytes (CTL)
  4.    None of these
 Discuss Question
Answer: Option A. -> both (a) and (b)
Question 95. Plasma cells produce thousands of __________ that are released into the bloodstream
  1.    antigens
  2.    antibodies
  3.    helper T cells
  4.    virus fragments
 Discuss Question
Answer: Option B. -> antibodies
Question 96. What is a protein produced by host cells infected by viruses?
  1.    Antiserum
  2.    Histamine
  3.    Interferon
  4.    Vaccine
 Discuss Question
Answer: Option C. -> Interferon
Question 97. Antibodies bound to an invading microorganism activate the complement system via
  1.    Entner-Doudoroff pathway
  2.    metabolic pathway
  3.    Embden Meyerhof pathway
  4.    classical pathway
 Discuss Question
Answer: Option D. -> classical pathway
Question 98. Immunological memory is due to
  1.    long lived B cells that secrete a specific antibody
  2.    short lived macrophage that can recognize specific pathogens
  3.    short lived helper T cells that signal macrophage to divide
  4.    long lived B cells that secrete a specific antigen
 Discuss Question
Answer: Option A. -> long lived B cells that secrete a specific antibody
Question 99. Polysaccharides on the surface of infecting microorganisms can also activate complement directly in the absence of
  1.    antigen via the alternative pathway
  2.    None of these
  3.    antibody via metabolic pathway
  4.    antibody via the alternative pathway
 Discuss Question
Answer: Option D. -> antibody via the alternative pathway
Question 100. What is the result of an abnormal response of the immune system to part of a person's own body?
  1.    An autoimmune disease
  2.    Passive immunity
  3.    Cancer
  4.    An allergic response
 Discuss Question
Answer: Option A. -> An autoimmune disease

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