Northern Virginia Community College BIO 150 Exam 3 review questions-immune system and viruses Microbiology Fall 2013 1)Antigens coated with antibodies are susceptible to: further antibody attack phagocytosis helper T cells B cells all of the above   Antigen-antibody binding may result in all of the following except: agglutination of antigens complement activation increased antiviral resistance neutralization of the antigen opsonization of the antigen     The major class of antibodies that can cross the placenta is: IgA IgD IgE IgM IgG   The major class of antibody that is found in mucous membranes and secretions is: IgA IgD IgE IgM IgG         Which of the following class of antibodies can activate (fix) complement? IgA, IgE IgA, IgG, IgM IgG, IgM, IgD IgG, IgM IgA, IgG, IgM, IgD, IgE   Which T cell can destroy virus-infected cells? helper T cell cytotoxic T cell delayed type T cell memory T cell suppressor T cell   Which T cells helps in antibody production ? helper T cell cytotoxic T cell delayed type T cell memory T cell suppressor T cell