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JAMB Biology 1989 Question 22

Question 22

Transport in Animals

There will be agglutination when the

  1. A.Group A serum mixes with Group A erythrocytes
  2. B.Group A serum mixes with Group B erythrocytes
  3. C.Group AB serum mixes with Group O erythrocytes
  4. D.Group B serum mixes with Group B erythrocytes
Show the answer and explanation

Answer: B (Group A serum mixes with Group B erythrocytes)

Explanation

Group A serum contains anti-B antibodies, which clump red cells carrying antigen B.