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 (A)</p> Signup and view all the answers

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

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

Which of the following is true about TCRs?

<p>They function as membrane receptors only (D)</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 (A)</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 (C)</p> Signup and view all the answers

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

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

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