CBSENEETClass 11
Which blood group is the universal donor?
Answer
Blood group O negative is the universal donor because its red blood cells carry no A, B or Rh antigens to trigger a reaction.
The working
Answer
O negative blood is called the universal donor as it can be given to people of any blood group in emergencies.
Reason
Its red cells lack A, B and Rh antigens, so the recipient body does not attack the donated cells.
Universal recipient
In contrast, AB positive is the universal recipient because its plasma has no anti-A or anti-B antibodies.
Exam point
Antigens are present on red blood cells, while antibodies are present in the plasma.
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