KROK 1 2010 – Question 111 · KROK (Medicine) · Physiology
Blood group of a 30 year old man was specified before an operation. His blood is Rh-positive. Reaction of erythrocyte agglutination was absent with standard sera of 0αβ (I), Aβ (II), Bα (III) groups. The blood under examination is of the following group:
- A. AB (IV)
- B. Aβ (II)
- C. Bα (III)
- D. 0αβ (I)
- E. -
Hint
Agglutination happens only when an erythrocyte antigen meets its matching antibody; ask what the absence of any reaction with all the standard sera implies about the antigens on these cells.
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