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Q12 (CDS-II/2014) Science & Technology › Biotechnology & Health › Human genetics and disorders Answer Verified

Which of the statements given below are correct ? 1. A person having blood group ‘A’ can donate blood to persons having blood group ‘A’ and blood group ‘AB 2. A person having blood group ‘AB’ can donate blood to persons having blood groups ‘A1, ‘B’, ‘AB’ or ‘O’. 3. A person with blood group ‘O’ can donate blood to persons having any blood group. 4. A person with blood group ‘O’ can receive blood from the person of any of the blood groups. Select the correct answer using the code given below:

Result
Your answer: —  ·  Correct: D
Explanation

The ABO blood group system is based on the presence or absence of antigens on red blood cells. Statement 1 is correct because individuals with blood group A have A antigens and can donate to those with group A or AB. Statement 2 is incorrect; group AB individuals have both A and B antigens and can only donate to other AB individuals, though they are universal recipients. Statement 3 is correct as group O lacks A and B antigens, making it the universal donor that can be given to any blood group [1]. Statement 4 is incorrect because group O individuals have both anti-A and anti-B antibodies in their plasma, meaning they can only receive blood from other group O donors. Therefore, only statements 1 and 3 are accurate regarding blood compatibility.

Sources

  1. [1] https://medlineplus.gov/ency/article/001306.htm
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