WAEC Biology 2021 Objective — Question 43
Question 43 of 50 from the West African Examinations Council (WAEC) Biology 2021 Objective paper, with the correct answer and a full explanation.
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43. A mixture of blood with antigen A and blood containing antibody A will
- A. lead to agglutination.Correct
- B. facilitate dissolution of clot.
- C. have no effect on blood composition.
- D. change the blood group.
Explanation
When blood containing a given antigen is mixed with blood containing the matching/contrasting antibody, the red cells clump together — agglutination.
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