Immune System T cell receptors (or TCR) on CD4+ T cells are secreted out into the environment to bind antigens recognize peptides associated with MHC class II molecules recognize peptides associated with MHC class I molecules recognize peptides not associated with MHC molecules are secreted out into the environment to bind antigens recognize peptides associated with MHC class II molecules recognize peptides associated with MHC class I molecules recognize peptides not associated with MHC molecules ANSWER DOWNLOAD EXAMIANS APP
Immune System Chemically an antigen may be protein any of these polysaccharide lipid protein any of these polysaccharide lipid ANSWER DOWNLOAD EXAMIANS APP
Immune System Treatment with bacterial endotoxins results blast formation in B cells none of these monocytes T cells B cells none of these monocytes T cells ANSWER DOWNLOAD EXAMIANS APP
Immune System Which of the following is correct for CD8 T cells? In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only CD8 T cells can kill individual virus-infected cells in a contact dependent fashion CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells 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 cells can kill individual virus-infected cells in a contact dependent fashion CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells CD8 T cells only recognize virus-infected cells ANSWER DOWNLOAD EXAMIANS APP
Immune System Which of the following proteins would not need localization signal? A nuclear protein A protein bound to the endoplasmic reticulum (ER) membrane A cell surface protein A cytosolic protein A nuclear protein A protein bound to the endoplasmic reticulum (ER) membrane A cell surface protein A cytosolic protein ANSWER DOWNLOAD EXAMIANS APP
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 rearrangements of the DNA encoding the variable regions of the heavy and light chains Both (a) and (b) By the combination of different heavy and light chains that form the antigen binding site Antibody proteins can physically change their shape to bind different epitopes By rearrangements of the DNA encoding the variable regions of the heavy and light chains Both (a) and (b) By the combination of different heavy and light chains that form the antigen binding site ANSWER DOWNLOAD EXAMIANS APP
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