IMMUNE SYSTEM QUIZ

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

TRUE ANSWER : ?
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Following are the defenses of the colon except

mucus

fast flow rate

sIgA

dense resident microbiota

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CD8 surface antigen is present in

both (a) and (b)

cytotoxic T cells

none of these

suppresssor T cells

TRUE ANSWER : ?
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Chemically an antigen may be

lipid

protein

polysaccharide

any of these

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Macrophages are professional antigen- presenting cells. The protein molecule through which they present antigen in human is

CD8

actin

HLA

interleukin

TRUE ANSWER : ?
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Natural killer cells are involved in

all of these

allograft rejection

tumour rejection

non-specific killing of virus transformed target cells

TRUE ANSWER : ?
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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

CD8 T cells can kill individual virus-infected cells in a contact dependent fashion

In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only

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Which is not an antigen-presenting cell (or APC)?

Dendritic cell

All of these

B cell

Polymorphonuclear leukocyte (or PMN)

TRUE ANSWER : ?
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Treatment with bacterial endotoxins results blast formation in

none of these

T cells

B cells

monocytes

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Large parasites such as helminthes may be killed extracellularly by the action of

monocytes

eosinophils

neutrophils

basophils

TRUE ANSWER : ?
YOUR ANSWER : ?