T/F: The tuberculin reaction develops within 30 minutes of the skin test in people with prior sensitization due to tuberculosis infection.
A. TRUE
B. FALSE
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Which of the following statements does not represent the role of a cell marker in the third line of defense?
A. They are attachment sites for foreign molecules.
B. They serve as recognition factors for self and nonself molecules.
C. They receive and transmit signals to coordinate the immune response.
D. They serve as transcription factors to initiate antibody production.
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