Immune System Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated? Antibody proteins can physically change their shape to bind different epitopes By the combination of different heavy and light chains that form the antigen binding site Both (a) and (b) By rearrangements of the DNA encoding the variable regions of the heavy and light chains Antibody proteins can physically change their shape to bind different epitopes By the combination of different heavy and light chains that form the antigen binding site Both (a) and (b) By rearrangements of the DNA encoding the variable regions of the heavy and light chains ANSWER DOWNLOAD EXAMIANS APP
Immune System Polymorphonuclear leukocytes (or PMNs) All of these can be attracted to the site of an infection following activation of complement are a type of phagocyte that can engulf and kill bacteria are derived from bone marrow stem cells All of these can be attracted to the site of an infection following activation of complement are a type of phagocyte that can engulf and kill bacteria are derived from bone marrow stem cells ANSWER DOWNLOAD EXAMIANS APP
Immune System Which of the following is correct for CD8 T 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 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 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 ANSWER DOWNLOAD EXAMIANS APP
Immune System Natural killer cells are involved in non-specific killing of virus transformed target cells tumour rejection allograft rejection all of these non-specific killing of virus transformed target cells tumour rejection allograft rejection all of these ANSWER DOWNLOAD EXAMIANS APP
Immune System Large parasites such as helminthes may be killed extracellularly by the action of eosinophils neutrophils basophils monocytes eosinophils neutrophils basophils monocytes ANSWER DOWNLOAD EXAMIANS APP
Immune System Which is not an antigen-presenting cell (or APC)? All of these B cell Dendritic cell Polymorphonuclear leukocyte (or PMN) All of these B cell Dendritic cell Polymorphonuclear leukocyte (or PMN) ANSWER DOWNLOAD EXAMIANS APP
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