Which antigens are found on the RBCs of AB+ (AB positive) blood? A. A antigens.

Question

Which antigens are found on the RBCs of AB+ (AB positive) blood? A. A antigens. B. B antigens. C. Rh antigens D. AOA E. NOA What happens when a person with Rh-(Rh negative) type blood is exposed to Rh+ (Rh positive) blood via transfusion or pregnancy? A. their lymphocytes produce anti-Rh antibodies. B. their red blood cells develop Rh antigens. C. both A. and B. D. nothing-there is no response. What type of blood does someone have if their blood agglutinates with anti-Rh antibody and not with anti-A or anti-B antibodies? A. A+. B. A- C. B+. D. B-. E. AB+. F. AB-. G. O+. H. O-.

Explanation / Answer

1) Persons with A blood group have A antigens on their RBCs. Persons with B group have B antigens on their RBC surface. Positive blood group persons have Rhesus antigen on their RBCs. So, the antigens found in the RBCs of AB+ blood group persons are both A and B antigens along with Rh antigen. Therefore, the answer for this question are options A, B and C.

2) When a Rh- negative person is exposed to Rh+ positive blood, their immune system will recognise Rh antigen as a foreign and produces antibodies against it. Therefore, the answer for this question is the lymphocytes of Rh- person will produce anti Rh antibodies. (option A).

3) Agglutination is the process which occurs when an antigen is mixed with its corresponding antibodies. Here, the blood of an individual agglutinates with anti-Rh antibody. So it has Rh antigen. Further, no agglutination is seen with either anti-A or anti-B antibodies. So, the individual has O blood group. Therefore, the answer for this question is option G (O+).

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