SCMED2020 Immunology 17. Which of the following statements about immunoglobulin
ID: 126303 • Letter: S
Question
SCMED2020 Immunology 17. Which of the following statements about immunoglobulin cl switching is INCORRECT ass A. Cla ss switching alters the specificity of the antibody by switching the immunoglobulin light chains B. Class switching involves changing the heavy chain constant region that is used C. D. Class switching is influenced by cytokines produced by CD4 T cells CD40-CD40L interactions are important for class switching 18. Which of the following statements about ABO blood grouping is INCORRECT? A. Group A cells express A antigens B. Group A serum contains antibodies to B antigens C. Group AB individuals have serum antibodies to both A and B antigens D. Anti-A antibodies are found in the serum of Group B and Group C individuals Which of the following is NOT involved in the activation of naive T cells by antigen presenting cells (APC)? 19. A. Integrins on the T cell binding to their ligands on the APC, to stabilise B. C. D. the interaction TCR recognition of an MHC peptide complex on the APC CD28 on the T cell binding to B7 (CD80) on the APC IFNy from the naïve T cell binding to cytokine receptors on the APC When bound to the surface of a pathogen, antibodies can... A. B. C. D. 20. Inhibit the activation of complement proteins in the serum Prevent NK cells from killing the microbe Trigger the activation of CD8 memory T cells Enhance phagocytosis of the pathogen by macrophagesExplanation / Answer
According to the Chegg guidelines I'll answer the first question when more than one question is posted. Post them separately to get the answers.
17- A) Class switching allows the specificity of the antibody by switching the immunoglobin light chains because constant regions of the heavy chains changes but variable region doesn't change. So specificity remains the same.
B, C and D are correct answers as they are the true statement in the immunoglobulin class switching.
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