Immunology and Blood Bank questions for the MOHAP lab exam.
This combined section covers the immune response and serological testing alongside immunohematology: blood grouping, antibody screening and identification, compatibility testing and transfusion practice. Candidates for the MOHAP exam should understand the antigen-antibody reactions that link the two fields and apply them to safe transfusion decisions.
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753
immunology and blood bank practice questions
- 15%
- of the exam
- 8
- subtopics
- Oct 2026
- updated
Inside this topic.
The subtopics our immunology and blood bank questions cover.
- Techniques
- Antibodies
- Transfusion Reactions
- ABO/Rh
- Components
- Serology
- Virology
- Methodology
Key facts to remember.
High-yield immunology and blood bank points to revise before the exam.
- 1
The indirect antiglobulin test (IAT) detects antibodies in patient plasma that coat red cells in vitro and is used in antibody screening and crossmatching.
- 2
Anti-D is not naturally occurring; it forms only after exposure to RhD-positive red cells through transfusion or pregnancy.
- 3
Kidd antibodies (anti-Jka and anti-Jkb) are a classic cause of delayed hemolytic transfusion reactions because their levels can fall below detection.
- 4
The classical complement pathway begins when C1q binds antigen-antibody complexes containing IgM or certain IgG subclasses.
- 5
Patients with IgA deficiency and anti-IgA antibodies can have anaphylactic transfusion reactions and need IgA-deficient or washed components.
Sample questions with answers.
10 practice questions for the MOHAP Medical Laboratory Technologist & Technician Licensing Exam - UAE (CBT) (Immunology and Blood Bank). Pick an answer to see if you're right, with a full explanation.
Question 1
Which "Blood Group" antibodies are typically "IgM" and react best at room temperature or below?
Question 2
CPDA allows stored blood to be kept for approximately:
Question 3
A positive nitrite test in urine requires which condition?
Question 4
Which immunoglobulin is first produced in an acute infection?
Question 5
A patient develops urticaria during transfusion. MOST likely reaction?
Question 6
A blood unit stored at 4°C is suitable for how long (PRBCs)?
Question 7
What is the "Universal Donor" for Red Blood Cells?
Question 8
A patient with severe thrombocytopenia and bleeding requires:
Question 9
Which complement component is primarily responsible for chemotaxis of neutrophils?
Question 10
Which urine finding is most specific for glomerular bleeding?
Other topics in this exam.
Questions, answered
Start by ruling out antigens present on cells that did not react, then look for the specificity that matches the pattern of positive reactions. Note the phase of reaction (immediate spin, 37°C or antiglobulin) and whether the autocontrol is positive, as these help separate warm alloantibodies, cold antibodies and autoantibodies. Dosage, seen with Kidd and some Rh antibodies, explains weaker reactions with heterozygous cells.
Antibody classes and their properties are central: IgM antibodies cause direct agglutination and activate complement efficiently, while IgG antibodies usually need the antiglobulin phase to be detected. Understanding the antiglobulin test, complement activation and the prozone effect makes both immunology and transfusion questions easier. Revising the two topics side by side reinforces these links.
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All 753 immunology and blood bank questions, with explanations and a readiness score for this topic.