ABO ACTUAL EXAM PAPER Questions with Correct Answers
(Grade A+)
Question 1: Human red blood cells can be classified as.
Answer: A, B, O or AB
Question 2: Almost all healthy people older than 4-6 months of age have naturally occurring ______ to
the ABO ______ they lack.
Answer: antibodies, antigens
Question 3: If the ABO antigen is present on the cells the corresponding ______ will be absent in the
serum.
Answer: antibody
Question 4: If the ABO antibody is present in the serum the corresponding ______ will be absent on the
cells.
Answer: antigen
Question 5: ABO Blood Group System.
Answer: most significant for transfusion and transplantation practice due to mutual antibodies being
predictably present in the sera whose RBCs lack the antigen
Question 6: Monoclonal Antibodies.
Answer: derived from culture cell lines, which have several advantages over conventional human and plant
ABO reagents
Question 7: Major Advantage of Monoclonal Antibodies.
Answer: Reproducibility
Question 8: anti-A reagent is.
Answer: BLUE
Question 9: anti-B reagent is.
Answer: YELLOW
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, Question 10: anti-A1 and anti-H are.
Answer: colorless & used to resolve ABO discrepancies
Question 11: Inverse Reciprocal Relationship.
Answer: between forward and reverse type, one serving as a check on the other
Question 12: Forward Grouping.
Answer: testing for an individual's ABO antigens (unknown antigens) using antisera (known ABO
antibodies)
Question 13: Reverse Grouping.
Answer: testing for the presence or absence of individual ABO antibodies (unknown antibodies) using
reagent RBCs (known antigens)
Question 14: Percentage of Caucasians/AAs with group O.
Answer: 45%, 49%
Question 15: Percentage of Caucasians/AAs with group A.
Answer: 40%, 27%
Question 16: Percentage of Caucasians/AAs with group B.
Answer: 11%, 19%
Question 17: Percentage of Caucasians/AAs with group AB.
Answer: 4% (both)
Question 18: Most common blood group types.
Answer: O & A
Question 19: Rarest blood group type.
Answer: AB
Question 20: Major antigens for the of the ABO system.
Answer: A, B, H (O)
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(Grade A+)
Question 1: Human red blood cells can be classified as.
Answer: A, B, O or AB
Question 2: Almost all healthy people older than 4-6 months of age have naturally occurring ______ to
the ABO ______ they lack.
Answer: antibodies, antigens
Question 3: If the ABO antigen is present on the cells the corresponding ______ will be absent in the
serum.
Answer: antibody
Question 4: If the ABO antibody is present in the serum the corresponding ______ will be absent on the
cells.
Answer: antigen
Question 5: ABO Blood Group System.
Answer: most significant for transfusion and transplantation practice due to mutual antibodies being
predictably present in the sera whose RBCs lack the antigen
Question 6: Monoclonal Antibodies.
Answer: derived from culture cell lines, which have several advantages over conventional human and plant
ABO reagents
Question 7: Major Advantage of Monoclonal Antibodies.
Answer: Reproducibility
Question 8: anti-A reagent is.
Answer: BLUE
Question 9: anti-B reagent is.
Answer: YELLOW
Page 1
, Question 10: anti-A1 and anti-H are.
Answer: colorless & used to resolve ABO discrepancies
Question 11: Inverse Reciprocal Relationship.
Answer: between forward and reverse type, one serving as a check on the other
Question 12: Forward Grouping.
Answer: testing for an individual's ABO antigens (unknown antigens) using antisera (known ABO
antibodies)
Question 13: Reverse Grouping.
Answer: testing for the presence or absence of individual ABO antibodies (unknown antibodies) using
reagent RBCs (known antigens)
Question 14: Percentage of Caucasians/AAs with group O.
Answer: 45%, 49%
Question 15: Percentage of Caucasians/AAs with group A.
Answer: 40%, 27%
Question 16: Percentage of Caucasians/AAs with group B.
Answer: 11%, 19%
Question 17: Percentage of Caucasians/AAs with group AB.
Answer: 4% (both)
Question 18: Most common blood group types.
Answer: O & A
Question 19: Rarest blood group type.
Answer: AB
Question 20: Major antigens for the of the ABO system.
Answer: A, B, H (O)
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