Which of the following statements is false regarding B cells? B one marrow stem cells migrate to the thymus and develop into B cells B cells that recognize high concentrations of antigens (self) in the absence of other signals undergo apoptosis in the bone marrow B cells can undergo class switching and produce a different antibody type B cells synthesize antibodies and put them on their cell surface TRUE ANSWER : ? YOUR ANSWER : ?
Major Histo Compatibility Complex (MHC) is a collection of genes arrayed on chromosome 21 in man, chromosome 6 in mice chromosome 17in man, chromosome 6 in mice chromosome 6 in man, chromosome 17 in mice chromosome 6 in man, chromosone 21 in mice TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following expresses CD3 surface antigen? Granulocytes T cells B cells Monocytes TRUE ANSWER : ? YOUR ANSWER : ?
T cell receptors (or TCR) on CD4+ T cells recognize peptides not associated with MHC molecules recognize peptides associated with MHC class I molecules recognize peptides associated with MHC class II molecules are secreted out into the environment to bind antigens TRUE ANSWER : ? YOUR ANSWER : ?
Chemically an antigen may be any of these lipid polysaccharide protein TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is correct for CD8 T cells? CD8 T cells can kill individual virus-infected cells in a contact dependent fashion CD8 T cells only recognize virus-infected cells In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells TRUE ANSWER : ? YOUR ANSWER : ?
Cytotoxic T-cells can be recognized by which of the following cell surface marker? CD8 CD7 CD4 CD9 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is correct for isoantigens? They are antigens found in some members of different species They are antigens found in all members of different species They are antigens found in all members of a species They are antigens found in some members of a species TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following proteins would not need localization signal? A cell surface protein A cytosolic protein A nuclear protein A protein bound to the endoplasmic reticulum (ER) membrane TRUE ANSWER : ? YOUR ANSWER : ?
Treatment with bacterial endotoxins results blast formation in none of these B cells T cells monocytes TRUE ANSWER : ? YOUR ANSWER : ?