IMMUNOHEMATOLOGY EXAM
QUESTIONS WITH VERIFIED
ANSWERS. A+ GRADE 2025/2026.
Amorphs are genes which - ANS produce no detectable effects
The position occupied by a gene on a chromosome is called the: - ANS locus
The electrical force on red cells in solution that causes them to repel each other is called the: -
ANS zeta potential
Situation: A technologist uses a red cell suspension that is too concentrated for a cell grouping
test. This error might produce which of the following? - ANS a false negative result due to
postzone
ABO reverse grouping consists of the addition of: - ANS cells of known antigen composition
to serum of unknown antibody content
"Sensitized" red cells are: - ANS coated with antibodies
Anti-A,B serum - ANS all but a
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, The A2 antigen occurs in what percentage of group A individuals? - ANS 20
Why isn't reverse blood grouping reliable for newborn infants? - ANS because the newborn's
antibody titer is very low
If the mother is group O and the infant is group B, the infant's blood group genotype is: -
ANS BO
Which of the following substances will be found in the saliva of a group B secretor? - ANS B
and H
If two homozygous group A adults were to have offspring, what blood type might those
offspring be: - ANS A
The gene responsible for the formation of the immediate red cell precursor substance which
may then be modified by the A and B genes is: - ANS H
A fucose is added to the ABO backbone by which gene? - ANS Le, H, Se (All but P1)
A patient's ABO blood grouping produced the following results:
Anti-A: Pos
Anti-B: Pos
A1 cells: Pos
B cells: Neg
Auto Control: Neg
Given that the daily reagent QC was OK, which of the following is the best interpretation for
these results? - ANS The patient is an A2B with an anti-A1
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
QUESTIONS WITH VERIFIED
ANSWERS. A+ GRADE 2025/2026.
Amorphs are genes which - ANS produce no detectable effects
The position occupied by a gene on a chromosome is called the: - ANS locus
The electrical force on red cells in solution that causes them to repel each other is called the: -
ANS zeta potential
Situation: A technologist uses a red cell suspension that is too concentrated for a cell grouping
test. This error might produce which of the following? - ANS a false negative result due to
postzone
ABO reverse grouping consists of the addition of: - ANS cells of known antigen composition
to serum of unknown antibody content
"Sensitized" red cells are: - ANS coated with antibodies
Anti-A,B serum - ANS all but a
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, The A2 antigen occurs in what percentage of group A individuals? - ANS 20
Why isn't reverse blood grouping reliable for newborn infants? - ANS because the newborn's
antibody titer is very low
If the mother is group O and the infant is group B, the infant's blood group genotype is: -
ANS BO
Which of the following substances will be found in the saliva of a group B secretor? - ANS B
and H
If two homozygous group A adults were to have offspring, what blood type might those
offspring be: - ANS A
The gene responsible for the formation of the immediate red cell precursor substance which
may then be modified by the A and B genes is: - ANS H
A fucose is added to the ABO backbone by which gene? - ANS Le, H, Se (All but P1)
A patient's ABO blood grouping produced the following results:
Anti-A: Pos
Anti-B: Pos
A1 cells: Pos
B cells: Neg
Auto Control: Neg
Given that the daily reagent QC was OK, which of the following is the best interpretation for
these results? - ANS The patient is an A2B with an anti-A1
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
