Which characterizes antibodies?
A) They occur in blood but not lymph.
B) They present antigen to T-helper cells.
C) They bind to molecules that identify self.
D) They are secreted as multiple copies when an antigen invades the body for the first time and binds to a B cell receptor.
E) They are produced by cytotoxic T cells.
Correct Answer:
Verified
Q167: According to the clonal selection theory,
A) an
Q168: The fact that B cells and T
Q169: Refer to the figure showing the adaptive
Q170: Serum from guinea pigs injected with less
Q171: Which statement is correct?
A) People who have
Q173: Which statement is false?
A) Vaccination initiates a
Q174: What typically prompts a naïve B cell
Q175: Which characterizes plasma cells?
A) They have few
Q176: Clonal deletion removes
A) aging memory cells.
B) immature
Q177: The process by which immature B or
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