Antigen Receptors of B and T Lymphocytes
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Questions and Answers

Which of the following is a fundamental difference between B cell and T cell antigen receptors?

  • B cell receptors recognize peptides bound to MHC molecules, while T cell receptors recognize only peptides bound to MHC molecules
  • B cell receptors recognize peptides bound to MHC molecules, while T cell receptors recognize many types of chemical structures
  • B cell receptors recognize many types of chemical structures, while T cell receptors recognize many types of chemical structures
  • B cell receptors recognize many types of chemical structures, while T cell receptors recognize only peptides bound to MHC molecules (correct)

    • What is the broad specificity of B cells in recognizing antigens?

  • B cells can recognize many types of chemical structures including proteins, lipids, carbohydrates, and nucleic acids (correct)
  • B cells can recognize only carbohydrates and nucleic acids
  • B cells can recognize only proteins and lipids
  • B cells can recognize only peptides bound to MHC molecules

    • What ensures that T cells only interact with peptides displayed on antigen-presenting cells?

  • T cells interact with microbial or tumor antigens present inside other cells
  • T cells recognize peptides bound to MHC molecules (correct)
  • T cells interact with free or soluble antigens
  • T cells recognize many types of chemical structures

    • Which of the following is NOT a function of antibodies?

    <p>Performing effector functions in cell-mediated immunity</p> Signup and view all the answers

    What is the total number of possible receptors with unique binding sites?

    <p>~107-109 clones</p> Signup and view all the answers

    Which of the following is true about TCRs?

    <p>They function as membrane receptors only</p> Signup and view all the answers

    What do the constant regions of some secreted antibodies have the ability to bind to?

    <p>Proteins of the complement system</p> Signup and view all the answers

    Which regions of the antigen receptor molecules are relatively conserved among all clones of lymphocytes?

    <p>Constant (C) regions</p> Signup and view all the answers

    What are the regions of the antigen receptor molecules that bind antigens?

    <p>Complementarity-determining regions (CDRs)</p> Signup and view all the answers

    What is the function of the invariant membrane proteins associated with antigen receptor chains?

    <p>To deliver intracellular signals</p> Signup and view all the answers

    What is the term used to describe the set of plasma membrane antigen receptor and signaling molecules in B lymphocytes?

    <p>B cell receptor (BCR) complex</p> Signup and view all the answers

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