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MCQs

Total Questions : 191 | Page 18 of 20 pages
Question 171. Which of the following is correct for CD8 T cells?
  1.    CD8 T cells only recognize virus-infected cells
  2.    In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only
  3.    CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells
  4.    CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
 Discuss Question
Answer: Option D. -> CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
Question 172. Large parasites such as helminthes may be killed extracellularly by the action of
  1.    neutrophils
  2.    eosinophils
  3.    monocytes
  4.    basophils
 Discuss Question
Answer: Option B. -> eosinophils
Question 173. Passive immunization is done for
  1.    diphtheria
  2.    all of these
  3.    enteric fever
  4.    tuberculosis
 Discuss Question
Answer: Option A. -> diphtheria
Question 174. Which of the following expresses CD3 surface antigen?
  1.    B cells
  2.    T cells
  3.    Monocytes
  4.    Granulocytes
 Discuss Question
Answer: Option B. -> T cells
Question 175. Polymorphonuclear leukocytes (or PMNs)
  1.    can be attracted to the site of an infection following activation of complement
  2.    are a type of phagocyte that can engulf and kill bacteria
  3.    All of these
  4.    are derived from bone marrow stem cells
 Discuss Question
Answer: Option C. -> All of these
Question 176. CD8 surface antigen is present in
  1.    none of these
  2.    suppresssor T cells
  3.    both (a) and (b)
  4.    cytotoxic T cells
 Discuss Question
Answer: Option C. -> both (a) and (b)
Question 177. Major Histo Compatibility Complex (MHC) is a collection of genes arrayed on
  1.    chromosome 6 in man, chromosome 17 in mice
  2.    chromosome 6 in man, chromosone 21 in mice
  3.    chromosome 21 in man, chromosome 6 in mice
  4.    chromosome 17in man, chromosome 6 in mice
 Discuss Question
Answer: Option A. -> chromosome 6 in man, chromosome 17 in mice
Question 178. Treatment with bacterial endotoxins results blast formation in
  1.    monocytes
  2.    T cells
  3.    none of these
  4.    B cells
 Discuss Question
Answer: Option D. -> B cells
Question 179. Cytotoxic T-cells can be recognized by which of the following cell surface marker?
  1.    CD8
  2.    CD9
  3.    CD4
  4.    CD7
 Discuss Question
Answer: Option A. -> CD8
Question 180. Which of the following proteins would not need localization signal?
  1.    A protein bound to the endoplasmic reticulum (ER) membrane
  2.    A cytosolic protein
  3.    A cell surface protein
  4.    A nuclear protein
 Discuss Question
Answer: Option B. -> A cytosolic protein

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