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Question 1 [CLICK ON ANY COICE TO KNOW RIGHT ANSWER]
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
Question 2 [CLICK ON ANY COICE TO KNOW RIGHT ANSWER]
Large parasites such as helminthes may be killed extracellularly by the action of
Question 3 [CLICK ON ANY COICE TO KNOW RIGHT ANSWER]
CD8 surface antigen is present in
cytotoxic T cells
suppresssor T cells
both (a) and (b)
none of these
Question 4 [CLICK ON ANY COICE TO KNOW RIGHT ANSWER]
Immunity is not long lasting to
Question 5 [CLICK ON ANY COICE TO KNOW RIGHT ANSWER]
Which of the following statements is false regarding B cells?
B cells can undergo class switching and produce a different antibody type
B one marrow stem cells migrate to the thymus and develop into B cells
B cells synthesize antibodies and put them on their cell surface
B cells that recognize high concentrations of antigens (self) in the absence of other signals undergo apoptosis in the bone marrow
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