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MCQs

Total Questions : 191 | Page 19 of 20 pages
Question 181. Which is not an antigen-presenting cell (or APC)?
  1.    All of these
  2.    B cell
  3.    Dendritic cell
  4.    Polymorphonuclear leukocyte (or PMN)
 Discuss Question
Answer: Option D. -> Polymorphonuclear leukocyte (or PMN)
Question 182. Chemically an antigen may be
  1.    lipid
  2.    polysaccharide
  3.    any of these
  4.    protein
 Discuss Question
Answer: Option C. -> any of these
Question 183. T cell receptors (or TCR) on CD4+ T cells
  1.    are secreted out into the environment to bind antigens
  2.    recognize peptides not associated with MHC molecules
  3.    recognize peptides associated with MHC class I molecules
  4.    recognize peptides associated with MHC class II molecules
 Discuss Question
Answer: Option D. -> recognize peptides associated with MHC class II molecules
Question 184. Following are the defenses of the colon except
  1.    fast flow rate
  2.    dense resident microbiota
  3.    sIgA
  4.    mucus
 Discuss Question
Answer: Option A. -> fast flow rate
Question 185. Lysozyme is present in
  1.    urine
  2.    saliva
  3.    sweat
  4.    Cerebro spinal fluid (CSF)
 Discuss Question
Answer: Option B. -> saliva
Question 186. Which of the following(s) is/are the determinants of antigenicity?
  1.    All of these
  2.    Chemical nature
  3.    Foreignness
  4.    Size of the antigen
 Discuss Question
Answer: Option A. -> All of these
Question 187. Natural killer cells are involved in
  1.    allograft rejection
  2.    all of these
  3.    non-specific killing of virus transformed target cells
  4.    tumour rejection
 Discuss Question
Answer: Option B. -> all of these
Question 188. Immunity is not long lasting to
  1.    diphtheria
  2.    whooping cough
  3.    mumps
  4.    influenza
 Discuss Question
Answer: Option D. -> influenza
Question 189. Which of the following statements is false regarding B cells?
  1.    B one marrow stem cells migrate to the thymus and develop into B cells
  2.    B cells that recognize high concentrations of antigens (self) in the absence of other signals undergo apoptosis in the bone marrow
  3.    B cells synthesize antibodies and put them on their cell surface
  4.    B cells can undergo class switching and produce a different antibody type
 Discuss Question
Answer: Option A. -> B one marrow stem cells migrate to the thymus and develop into B cells
Question 190. Macrophages are professional antigen- presenting cells. The protein molecule through which they present antigen in human is
  1.    CD8
  2.    HLA
  3.    interleukin
  4.    actin
 Discuss Question
Answer: Option A. -> CD8

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