Question

1. what do indirect agglutination tests use to detect antigen - antibody interactions?

a) electrophoresis
b) latex beads
c) enzymes
d) radioactive tags

1. iga antibodies are commonly found in secretions like saliva and tears. (true/false)
2. cell - mediated immunity is primarily effective against viruses found outside cells. (true/false)
3. cytotoxic t cells destroy infected cells by releasing lymphokines. (true/false)
4. haptens are complete antigens that stimulate antibody production by themselves. (true/false)
5. in indirect elisa, a known antigen is used to detect the presence of a specific antibody in a sample. (true/false)
6. ige is associated with allergic responses and binds to basophils. (true/false)
7. the immunodiffusion test forms visible lines of precipitation in a gel where antigen and antibody meet. (true/false)

Explanation:

• Question 8: Indirect agglutination tests use latex beads (or other particles) coated with antigens or antibodies to detect antigen - antibody interactions.
• Question 9: IgA antibodies are indeed found in secretions like saliva and tears.
• Question 10: Cell - mediated immunity is mainly effective against intracellular pathogens (e.g., viruses inside cells), not those outside.
• Question 11: Cytotoxic T cells destroy infected cells by releasing perforin and granzymes, not lymphokines.
• Question 12: Haptens are incomplete antigens that need a carrier molecule to stimulate antibody production.
• Question 13: In indirect ELISA, a known antigen is coated on a plate to capture specific antibodies in a sample.
• Question 14: IgE is associated with allergic responses and binds to basophils and mast cells.
• Question 15: Immunodiffusion tests form visible lines of precipitation in a gel when antigen and antibody meet.

Answer:

1. B. Latex beads
2. True
3. False
4. False
5. False
6. True
7. True
8. True