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Immune System(Microbiology ) Questions and Answers
Home
Topic
Microbiology
Immune System
Question 1.
Large parasites such as helminthes may be killed extracellularly by the action of
basophils
monocytes
eosinophils
neutrophils
Explanation:-
Answer: Option C. ->
eosinophils
Question 2.
Passive immunization is done for
tuberculosis
diphtheria
enteric fever
all of these
Explanation:-
Answer: Option B. ->
diphtheria
Question 3.
Which of the following is correct for CD8 T cells?
CD8 T cells only recognize virus-infected cells
CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells
In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only
CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
Explanation:-
Answer: Option D. ->
CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
Question 4.
Polymorphonuclear leukocytes (or PMNs)
can be attracted to the site of an infection following activation of complement
are derived from bone marrow stem cells
are a type of phagocyte that can engulf and kill bacteria
all of the above
Explanation:-
Answer: Option D. ->
all of the above
Question 5.
Which of the following is correct for isoantigens?
They are antigens found in all members of different species
They are antigens found in some members of a species
They are antigens found in all members of a species
They are antigens found in some members of different species
Explanation:-
Answer: Option B. ->
They are antigens found in some members of a species
Question 6.
Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated?
By rearrangements of the DNA encoding the variable regions of the heavy and light chains
By the combination of different heavy and light chains that form the antigen binding site
Antibody proteins can physically change their shape to bind different epitopes
Both (a) and (b)
Explanation:-
Answer: Option D. ->
Both (a) and (b)
Question 7.
Which of the following expresses CD3 surface antigen?
Granulocytes
T cells
Monocytes
B cells
Explanation:-
Answer: Option B. ->
T cells
Question 8.
. Treatment with bacterial endotoxins results blast formation in
B cells
T cells
monocytes
none of these
Explanation:-
Answer: Option A. ->
B cells
Question 9.
. Cytotoxic T-cells can be recognized by which of the following cell surface marker?
CD4
CD7
CD8
CD9
Explanation:-
Answer: Option C. ->
CD8
Question 10.
Major Histo Compatibility Complex (MHC) is a collection of genes arrayed on
chromosome 21 in man, chromosome 6 in mice
chromosome 6 in man, chromosone 21 in mice
chromosome 17in man, chromosome 6 in mice
chromosome 6 in man, chromosome 17 in mice
Explanation:-
Answer: Option D. ->
chromosome 6 in man, chromosome 17 in mice
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