ABO ADVANCED FORMULAS PRACTICE Questions with Correct
Answers (Grade A+)
Question 1: Which A subgroup can be detected serologically only after adsorption and elution studies?
Answer: Ael
Question 2: Select the statement that is true regarding group A2 red cells.
Answer: The A2 allele produces the same glycosyltransferase as the A1 allele.
Question 3: What is the immunodominant sugar for the H antigen?
Answer: Fucose
Question 4: According to Landsteiner's rule (law), what ABO antibody will be detected in a group AB
individual's serum?
Answer: None
Question 5: A patient is expressing soluble forms of H antigens in his secretions. Predict this person's
genotype.
Answer: HH, Sese
Question 6: Which of the following situations is most likely to cause an ABO incompatibility if blood is
transfused?
Answer: Group A plasma to a group AB recipient
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Answers (Grade A+)
Question 1: Which A subgroup can be detected serologically only after adsorption and elution studies?
Answer: Ael
Question 2: Select the statement that is true regarding group A2 red cells.
Answer: The A2 allele produces the same glycosyltransferase as the A1 allele.
Question 3: What is the immunodominant sugar for the H antigen?
Answer: Fucose
Question 4: According to Landsteiner's rule (law), what ABO antibody will be detected in a group AB
individual's serum?
Answer: None
Question 5: A patient is expressing soluble forms of H antigens in his secretions. Predict this person's
genotype.
Answer: HH, Sese
Question 6: Which of the following situations is most likely to cause an ABO incompatibility if blood is
transfused?
Answer: Group A plasma to a group AB recipient
Page 1
