Exam Questions and CORRECT Answers
Iron transfer form is named? - CORRECT ANSWER - Transferritin
What are the 2 T cell co-receptors? - CORRECT ANSWER - CD4 and CD8
What are the T cells surface rceptors - CORRECT ANSWER - TCR 1 and TCR 2
Which T cell receptor becomes memory cells and release cytokines? - CORRECT
ANSWER - CD4
Radial Immunodiffusion (RID) - CORRECT ANSWER - An immunoassay based on the
direct observation of antigen-antibody reaction within a gel matrix
Radial Immunodiffusion tests for - CORRECT ANSWER - Antigen concentration via
precipitatin zones
precipitation reaction - CORRECT ANSWER - Detects immune lattice complex
formation: Ag-Ab forms
precipitation reaction - CORRECT ANSWER - Ag-Ab lattice forms and diffuses out of
solution, visibly seen as becoming insoluble
Prozone precipitation - CORRECT ANSWER - Antibody excess
Postzone in precipitin curve - CORRECT ANSWER - Antigen excess
, What is the optimal precipitation zone - CORRECT ANSWER - When Antigen-Antibody
are at equal levels
What could cause toe or more precipitatin bands to form in an Antigen-Antibody experiment? -
CORRECT ANSWER - The antigens are different from each other and this the
precipitation bands will be different and cross-react
The following dilutions were set up to utter an antibody. The following results were obtained:
1:4+, 1:8+, 1:16+, 1:32+, 1:64-. How should the tiger be reported out? - CORRECT
ANSWER - 32
The RPR is a test for which STD? - CORRECT ANSWER - Syphilis
is the RPR test for treponema's or nontreponemal? - CORRECT ANSWER -
Nkntreponemal
What is a confirmatory test for syphilis? - CORRECT ANSWER - FTA-ABS
After infection, a patient develops Reagin antibodies of the nontreponemL type for this STD? -
CORRECT ANSWER - Syphilis
A new lab assay gave the following results: number of patients tested= 100; number of true
positives= 54, number of true negatives= 42; number of false positives= 2; number of false
negatives=2. What is the specificity ? - CORRECT ANSWER - 95.45%
What immunoglobulin crosses the placenta? - CORRECT ANSWER - IgG
ANA pattern: homogenous/diffuse associated with what AID? - CORRECT ANSWER -
SLE
AIDS confirmatory test - CORRECT ANSWER - Western blot method