Q:

What can be said about a person who has the “A” antigen on their red blood cells?

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What can be said about a person who has the “A” antigen on their red blood cells?


  1. their blood contains anti-B agglutinins
  2. their blood contains anti-A agglutinins
  3. their blood contains anti-A and anti-B agglutinins
  4. their blood contains neither anti-A nor anti-B agglutinins

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A: Their blood contains anti-B agglutinins. If you have the A antigen on your rbc, you cannot have the anti-A agglutinin in your plasma or you would agglutinate your own blood.

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