Polymorphonuclear leukocytes (or PMNs) are derived from bone marrow stem cells All of these are a type of phagocyte that can engulf and kill bacteria can be attracted to the site of an infection following activation of complement TRUE ANSWER : ? YOUR ANSWER : ?
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 TRUE ANSWER : ? YOUR ANSWER : ?
CD8 surface antigen is present in suppresssor T cells none of these both (a) and (b) cytotoxic T cells TRUE ANSWER : ? YOUR ANSWER : ?
Treatment with bacterial endotoxins results blast formation in B cells monocytes none of these T cells TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following expresses CD3 surface antigen? Granulocytes Monocytes B cells T cells TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following(s) is/are the determinants of antigenicity? Size of the antigen Foreignness Chemical nature All of these TRUE ANSWER : ? YOUR ANSWER : ?
Which is not an antigen-presenting cell (or APC)? Polymorphonuclear leukocyte (or PMN) All of these Dendritic cell B cell 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 : ?
Chemically an antigen may be lipid any of these polysaccharide protein TRUE ANSWER : ? YOUR ANSWER : ?