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JAMB Biology 2019 Objective — Question 22

Question 22 of 40 from the Joint Admissions and Matriculation Board (JAMB) Biology 2019 Objective paper, with the correct answer and a full explanation.

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During blood transfusion, agglutination may occur as a result of the reaction between

  • A. similar antigens and antibodies
  • B. contrasting antigens and antibodiesCorrect
  • C. different antigens
  • D. two different antibodies

Explanation

Agglutination occurs between contrasting (matching/reactive) antigens and antibodies. If a person with blood type A is transfused with type B blood, the antibody-B in the recipient's blood attacks the antigen in the donor's type B blood.

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