Infants immediately after birth are often at risk for infection with group B streptococcus. A vaccine is proposed for administration ot women of childbearing years. How can immunizing hte mothers, help hte babies?
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For each pair of antigens listed below, indicate which is likely to be more immunogenic. Explain your answer (i) Insulin and Insulin-BSA conjugate. (ii) A monomeric polypeptide (X) and a dimeric protein molecule
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What aer the two primary characteristics that distinguish hematopoietic stem cells and progenitor cells?
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An individual is infected with — i Intracellular bacteria and ii) Extracellular bacteria. Which kind(s) of immune response will be expected in each case?
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What are chemokines? Give one example.
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Explain briefly whether the following statements are true or false : (i) Dendritic cells arise only from the lymphoid organ. (ii) All TH cells express CD4 and recognize only antigen associated with class II MHC molecule. (iii) A hapten can stimulate antibody formation but cannot combine with many different antibody molecules. (iv) In order for … Read more
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Most viruses and bacteria enter cells via specific receptors. Why would a cell have receptors that allow pathogens to enter?
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Which region of the whole MHC molecule shows the highest amino acid variation? What roles do anchor residues play in peptide binding by MHC molecules?
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What is the role of Mucosal-Associated Lymphoid Tissue (MALT) in host defence?
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Compare and contrast the BCR and TCR in terms of the following characteristics : (i) Specificity for antigen (ii) Cellular expression (iii) Types of Ag recognized.
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