Page 166 - MNU microbiology theoritical 2025

General Microbiology & Immunology (PM 401) Second level Semester 4 2024/2025

Q1: Choose the best correct answers in the following statements

1. Serological reactions are useful for:
a- Detection of antigens b- Detection of antibodies
c- Both a and b d- None of these

2. A hapten is:
a. An epitope.
b. A small chemical grouping which reacts with preformed antibodies.
c. A carrier.
d. An immunogen.

3. On a serial dilution with the following tubes set up, 1:2, 1:4, 1:8, 1:16, 1:32,
and 1:64, there is no visible agglutination in the 1:64 tube. What is the titer
of the

a. 32
b. 16
c. 64
d. 8

4. An immunlolgic immunoassay situation in which antibody is in excess as
compared to antigen is called:

a. Postzone
b. Prozone
c. Equivalence zone
d. All answers are incorrect

General Microbiology & Immunology (PM 401) theoretical handbook Page 155