Blood Groups and Significance · NCERT Biology

A person with blood group 'O' has which of the following on their RBC surface and in their plasma?

  1. Both A and B antigens on RBCs; no antibodies in plasma
  2. No A or B antigens; anti-A and anti-B antibodies in plasma
  3. Antigen A; anti-B antibodies
  4. Antigen B; anti-A antibodies
Show answer and explanation

Correct answer: No A or B antigens; anti-A and anti-B antibodies in plasma

Blood group O is characterized by the absence of both A and B antigens on the RBC surface. Consequently, the plasma of such individuals contains both anti-A and anti-B antibodies.

Difficulty: Medium Question 2 of 20

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