Which of the Following Statements Concerning B Cell Receptors (BCRs)

question 43

Multiple Choice

Which of the following statements concerning B cell receptors (BCRs) is FALSE?

• A) Scientists estimate that each person forms at least 1011 different types of B lymphocytes with distinct BCRs.
• B) They are formed in response to an encounter with an antigen.
• C) They are complementary in shape to a specific antigenic determinant that they may or may not encounter.
• D) Each B lymphocyte is randomly generated with antibody variable regions that determine its BCR.
• E) They are bound to the surface of B lymphocytes and have two antigen -binding sites.

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