Which of These Statements Concerning B Cell Receptors (BCRs) Is

question 7

Multiple Choice

Which of these statements concerning B cell receptors (BCRs) is incorrect?

• A) Scientists estimate that each person forms at at least 109 different types of B lymphocytes with a set of distinct BCRs.
• B) Each B lymphocyte is randomly generated with antibody- variable regions that determine its BCR.
• C) They are complementary in shape to the antigenic determinants of antigens that they may or may not encounter.
• D) They are formed in response to an encounter with an antigen.
• E) They are bound to the surface of B lymphocytes and have two antigen- binding sites.

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Definitions:

Placebo Pills

Inert tablets used in clinical trials to assess the effectiveness of a new medication by comparison with no treatment.

Agitation

A state of nervousness or unrest often displayed as excessive movement or speaking, common in various psychiatric conditions.

Potential Confound

A variable that might falsely make one believe that a causal relationship exists between two other variables.

Seriously Ill

A condition or state in which an individual is suffering from a severe and life-threatening health problem.