SBB Practice test Review questions with correct answers

When preparing cryoprecipitate from plasma, the cryoprecipitate must be refrozen within? Correct Answer-1 hour Donated blood may not be used for allogeneic transfusion when HCV testing shows? Correct Answer-EIA initial testing reactive, and one of the duplicate repeat results is reactive The following hepatitis B testing results indicates: HBsAg: Nonreactive, Anti-HBc: Reactive, Anti-HBs: Reactive, RNA HBV: nonreactive. Correct Answer-Recurring infection (CDC says immune due to natural infection) The antigen that occurs in approximately 20% of individuals of African ethnicity is? Correct Answer-Js a The Diego blood group is of anthropological interest because? Correct Answer-Di a is more frequent in individuals of Mongolian ancestry Which antigen is a CR1? Correct Answer-McC c MHC Class II are found on? Correct Answer-Dendritic Cells Antigen-presenting cells such as dendritic cells, mononuclear phagocytes, some endothelial cells, thymic epithelial cells, and B cells. The Fc receptor on phagocytes that has the highest affinity for binding IgG is? Correct Answer-FcR1