ABO Blood group system Flashcards
1
Q
- The H antigen is found in highest concentration on
what type of red blood cell?
a. group A
b. group B
c. group AB
d. group O
A
d. group O
2
Q
- The lectin used for detection of the H antigen is called:
a. Arachis hypogaea
b. Dolichos biflorus
c. Ulex europaeus
d. Salvia sclarea
A
c. Ulex europaeus
3
Q
- Common sources of ABO discrepancies due to technical error include all the following except:
a. clerical mix-ups
b. contaminated reagents
c. warming of the test
d. patients with agammaglobulinemia
A
d. patients with agammaglobulinemia
4
Q
- An individual must inherit which of the following to be
classified as a group AB?
a. the A gene
b. the B gene
c. the H gene
d. answers a and b
e. answers a, b, and c
A
e. answers a, b, and c
5
Q
- The immunodominant sugar associated with the
A antigen is:
a. L-fucose
b. N-acetylgalactosamine
c. D-galactose
d. D-glucose
A
b. N-acetylgalactosamine
6
Q
- The gene that controls the presence or absence of the
H substance in body secretions is the:
a. H gene
b. Se gene
c. h gene
d. B gene
A
a. H gene
7
Q
- Group A2 constitutes approximately what percentage
of group A individuals?
a. 2%
b. 20%
c. 40%
d. 60%
e. 80%
A
b. 20%
8
Q
- Approximately what percentage of A2 individuals have
evidence of anti-A1 in the sera?
a. none
b. 1% to 8%
c. 13% to 18%
d. 50% or more
A
b. 1% to 8%
9
Q
- The antibody normally found in the serum of group B
individuals is:
a. anti-A
b. anti-B
c. anti-H
d. anti-A,B
A
a. anti-A
10
Q
- Approximately what percentage of adult levels of A and
B antigen are present at birth?
a. 10%
b. 25%
c. 50%
d. 100%
A
a. 10%
11
Q
- Fetal development of ABO antigens begins in the:
a. first week of fetal life
b. second week of fetal life
c. sixth week of fetal life
d. second trimester
A
c. sixth week of fetal life
12
Q
- ABO grouping discrepancies may occur due to which
of the following causes?
a. rouleaux
b. clerical error
c. atypical antibody
d. all of the above
A
d. all of the above
