Human Blood Groups and Their Importance MCQs

1. What are the main human blood group systems?
(A) A, B, O, AB only
(B) Rh, Kell, Kidd
(C) ABO and Rh
(D) A, B, C, D

2. A person with blood group AB can receive blood from which groups?
(A) Only AB
(B) A and B only
(C) O only
(D) A, B, AB, and O

3. Which blood group is considered the universal donor?
(A) AB+
(B) O+
(C) O−
(D) AB−

4. Which blood group is known as the universal recipient?
(A) O−
(B) AB+
(C) A+
(D) B−

5. The Rh factor is important because:
(A) It determines the shape of red blood cells
(B) It affects blood clotting
(C) It must match during blood transfusion to prevent complications
(D) It is responsible for white blood cell count

6. If a person is Rh-negative, they:
(A) Have Rh antigens on red blood cells
(B) Lack Rh antigens on red blood cells
(C) Can receive Rh-positive blood
(D) Can donate only to Rh-negative people

7. Blood group testing is essential before:
(A) Blood transfusions and organ transplants
(B) Starting exercise
(C) Taking antibiotics
(D) Drinking water

8. A mismatch in blood transfusion may lead to:
(A) Increased metabolism
(B) Immunity improvement
(C) Weight loss
(D) Hemolytic reaction

9. What type of antigen does blood group A have?
(A) A antigen
(B) B antigen
(C) AB antigen
(D) No antigen

10. The presence or absence of antigens and antibodies in blood helps in:
(A) Identifying cholesterol levels
(B) Predicting height
(C) Measuring sugar levels
(D) Determining blood group