8. Major Histo Compatibility Complex (MHC) is a collection of genes arrayed on
A.chromosome 21 in man, chromosome 6 in mice
B.chromosome 6 in man, chromosone 21 in mice
C.chromosome 17in man, chromosome 6 in mice
D.chromosome 6 in man, chromosome 17 in mice

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9. CD8 surface antigen is present in
A.cytotoxic T cells
B.suppresssor T cells
C.both (a) and (b)
D.none of these

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10. Treatment with bacterial endotoxins results blast formation in
A.B cells
B.T cells
C.monocytes
D.none of these

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11. Cytotoxic T-cells can be recognized by which of the following cell surface marker?
A.CD4
B.CD7
C.CD8
D.CD9

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12. Which is not an antigen-presenting cell (or APC)?
A.B cell
B.Polymorphonuclear leukocyte (or PMN)
C.Dendritic cell
D.All of the above

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13. Chemically an antigen may be
A.lipid
B.protein
C.polysaccharide
D.any of these

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14. T cell receptors (or TCR) on CD4+ T cells
A.recognize peptides not associated with MHC molecules
B.recognize peptides associated with MHC class I molecules
C.recognize peptides associated with MHC class II molecules
D.are secreted out into the environment to bind antigens

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