ABO PRE-TEST PRACTICE EXAMINATION Questions with
Correct Answers (Grade A+)
Question 1: the theory which explains light as a stream of invisible bundles of energy
Answer: Corpuscular.
Question 2: 5.1: Given the following ABO typing results, what is a potential conclusion for these
results? (Obj 17, 20)[IMAGE: ABO testing results table]Anti-A = 4+ Anti-B = 4+A₁ = 1+B = 0a)
expected results for a group O individualb) expected results for a group AB individualc) discrepant
results: patient has A antigens on red cells with anti-A in serumd) discrepant results: patient has B
antigens on red cells with no anti-B in serum
Answer: c) discrepant results: patient has A antigens on red cells with anti-A in serum---.
Question 3: 5.2: What are the gene products of the A and B alleles? (Obj 9)
A. glycolipids
B. glycoproteins
C. oligosaccharides
D. transferase enzymes
Answer: d) transferase enzymes---.
Question 4: 5.3: What is the ABO interpretation? (Obj 11)[IMAGE: ABO testing results table]Anti-A =
0Anti-B = 0A₁ = 4+B = 4+
A. group O
B. group A
C. group B
D. group AB
Answer: a) group O---.
Question 5: 5.4: What ABO phenotypes would be compatible if the patient in question 3 required a
transfusion of RBCs?[IMAGE: ABO testing results table]Anti-A = 0Anti-B = 0A₁ = 4+B = 4+
A. group AB, O, A, or B
B. group O or B
C. group AB or O
D. only group O
Answer: d) only group O---.
Question 6: the visible bundles of energy
Answer: Photons.
Page 1
,Question 7: 5.5: What ABO phenotypes would be compatible if the patient in Question 3 required a
transfusion of fresh frozen plasma? (Obj 11)[IMAGE: ABO testing results table]Anti-A = 0Anti-B =
0A₁ = 4+B = 4+
A. group AB, O, A, or B
B. group O or B
C. group AB or O
D. only group O
Answer: a) group AB, O, A, or B.
Question 8: 5.6: What term describes the procedure using known sources of reagent antisera (known
antibodies) to detect ABO antigens on a patient's red cells? (Obj 14)
A. Rh typing
B. reverse grouping
C. direct antiglobulin test
D. forward grouping
Answer: d) forward grouping---.
Question 9: 5.7: Which result is discrepant if the red cell typing shown in the following chart is correct?
(Obj 14)[IMAGE: ABO testing results table]
A. negative reaction with group B cells
B. positive reaction with anti-B
C. negative reaction with group A₁ cells
D. no discrepancies in these results
Answer: c) negative reaction with group A₁ cells---.
Question 10: The theory which explains light as moving in a series of wave pulsations.
Answer: Electromagnetic Theory.
Question 11: the speed of light in air
Answer: 186,000 miles per second.
Question 12: a point of light pulsating in a straight line
Answer: ray.
Page 2
,Question 13: 5.8: What is/are the expected ABO antibody(ies) in the reverse group using the patient's
plasma based on the following forward group testing results? (Obj 1)[IMAGE: Forward typing table
showing Anti-A = 0, Anti-B = 0]
A. anti-B
B. anti-A
C. anti-A and anti-B
D. none
Answer: c) anti-A and anti-B---.
Question 14: the colors that visible or white light are composed of
Answer: all colors.
Question 15: 5.9: According to Landsteiner's rule, if a patient has no ABO antibodies after plasma
testing, what ABO antigens are present on the patient's red cells? (Obj 1)
A. A
B. B
C. both A and B
D. none
Answer: c) both A and B---.
Question 16: 5.10: Select the ABO phenotypes, in order from most frequent to least frequent, that occur
in Hispanic ethnicities: (Obj 21)
A. A, B, O, AB
B. O, A, B, AB
C. B, A, AB, O
D. AB, O, B, A
Answer: b) O, A, B, AB---.
Question 17: a prism will bend light towards its
Answer: base.
Question 18: 5.11: Which of the following statements is true about ABO antibody production? (Obj 10)
A. ABO antibodies are present in newborns
B. ABO titers remain at constant levels throughout life
C. ABO antibodies are stimulated by gut bacteria and other environmental factors
D. All these statements are true
Answer: c) ABO antibodies are stimulated by gut bacteria and other environmental factors---.
Page 3
, Question 19: one diopter prism will deviate a ray of light one centimeter in a distance of
Answer: one meter.
Question 20: 5.12: What immunoglobulin class is primarily associated with ABO antibodies? (Obj 10)
A. IgA
B. IgG
C. IgE
D. IgM
Answer: d) IgM---.
Question 21: 5.13: What immunodominant sugar confers B blood group specificity? (Obj 6)
A. D-galactose
B. L-fucose
C. N-acetylgalactosamine
D. L-glucose
Answer: a) D-galactose---.
Question 22: the image being viewed through prism will always be displaced towards its
Answer: apex.
Question 23: the bending of light as it passed from a medium of lesser density to a medium of greater
density is known as
Answer: refraction.
Question 24: the speed of light in air divided by the speed of light in a material
Answer: refractive index.
Question 25: 5.14: An individual has the genotype AO, hh. What antigens would be present on the red
cells of this individual? (Obj 5, 9)
A. A only
B. A and H
C. A and O
D. none of the above
Answer: d) none of the above---.
Page 4
Correct Answers (Grade A+)
Question 1: the theory which explains light as a stream of invisible bundles of energy
Answer: Corpuscular.
Question 2: 5.1: Given the following ABO typing results, what is a potential conclusion for these
results? (Obj 17, 20)[IMAGE: ABO testing results table]Anti-A = 4+ Anti-B = 4+A₁ = 1+B = 0a)
expected results for a group O individualb) expected results for a group AB individualc) discrepant
results: patient has A antigens on red cells with anti-A in serumd) discrepant results: patient has B
antigens on red cells with no anti-B in serum
Answer: c) discrepant results: patient has A antigens on red cells with anti-A in serum---.
Question 3: 5.2: What are the gene products of the A and B alleles? (Obj 9)
A. glycolipids
B. glycoproteins
C. oligosaccharides
D. transferase enzymes
Answer: d) transferase enzymes---.
Question 4: 5.3: What is the ABO interpretation? (Obj 11)[IMAGE: ABO testing results table]Anti-A =
0Anti-B = 0A₁ = 4+B = 4+
A. group O
B. group A
C. group B
D. group AB
Answer: a) group O---.
Question 5: 5.4: What ABO phenotypes would be compatible if the patient in question 3 required a
transfusion of RBCs?[IMAGE: ABO testing results table]Anti-A = 0Anti-B = 0A₁ = 4+B = 4+
A. group AB, O, A, or B
B. group O or B
C. group AB or O
D. only group O
Answer: d) only group O---.
Question 6: the visible bundles of energy
Answer: Photons.
Page 1
,Question 7: 5.5: What ABO phenotypes would be compatible if the patient in Question 3 required a
transfusion of fresh frozen plasma? (Obj 11)[IMAGE: ABO testing results table]Anti-A = 0Anti-B =
0A₁ = 4+B = 4+
A. group AB, O, A, or B
B. group O or B
C. group AB or O
D. only group O
Answer: a) group AB, O, A, or B.
Question 8: 5.6: What term describes the procedure using known sources of reagent antisera (known
antibodies) to detect ABO antigens on a patient's red cells? (Obj 14)
A. Rh typing
B. reverse grouping
C. direct antiglobulin test
D. forward grouping
Answer: d) forward grouping---.
Question 9: 5.7: Which result is discrepant if the red cell typing shown in the following chart is correct?
(Obj 14)[IMAGE: ABO testing results table]
A. negative reaction with group B cells
B. positive reaction with anti-B
C. negative reaction with group A₁ cells
D. no discrepancies in these results
Answer: c) negative reaction with group A₁ cells---.
Question 10: The theory which explains light as moving in a series of wave pulsations.
Answer: Electromagnetic Theory.
Question 11: the speed of light in air
Answer: 186,000 miles per second.
Question 12: a point of light pulsating in a straight line
Answer: ray.
Page 2
,Question 13: 5.8: What is/are the expected ABO antibody(ies) in the reverse group using the patient's
plasma based on the following forward group testing results? (Obj 1)[IMAGE: Forward typing table
showing Anti-A = 0, Anti-B = 0]
A. anti-B
B. anti-A
C. anti-A and anti-B
D. none
Answer: c) anti-A and anti-B---.
Question 14: the colors that visible or white light are composed of
Answer: all colors.
Question 15: 5.9: According to Landsteiner's rule, if a patient has no ABO antibodies after plasma
testing, what ABO antigens are present on the patient's red cells? (Obj 1)
A. A
B. B
C. both A and B
D. none
Answer: c) both A and B---.
Question 16: 5.10: Select the ABO phenotypes, in order from most frequent to least frequent, that occur
in Hispanic ethnicities: (Obj 21)
A. A, B, O, AB
B. O, A, B, AB
C. B, A, AB, O
D. AB, O, B, A
Answer: b) O, A, B, AB---.
Question 17: a prism will bend light towards its
Answer: base.
Question 18: 5.11: Which of the following statements is true about ABO antibody production? (Obj 10)
A. ABO antibodies are present in newborns
B. ABO titers remain at constant levels throughout life
C. ABO antibodies are stimulated by gut bacteria and other environmental factors
D. All these statements are true
Answer: c) ABO antibodies are stimulated by gut bacteria and other environmental factors---.
Page 3
, Question 19: one diopter prism will deviate a ray of light one centimeter in a distance of
Answer: one meter.
Question 20: 5.12: What immunoglobulin class is primarily associated with ABO antibodies? (Obj 10)
A. IgA
B. IgG
C. IgE
D. IgM
Answer: d) IgM---.
Question 21: 5.13: What immunodominant sugar confers B blood group specificity? (Obj 6)
A. D-galactose
B. L-fucose
C. N-acetylgalactosamine
D. L-glucose
Answer: a) D-galactose---.
Question 22: the image being viewed through prism will always be displaced towards its
Answer: apex.
Question 23: the bending of light as it passed from a medium of lesser density to a medium of greater
density is known as
Answer: refraction.
Question 24: the speed of light in air divided by the speed of light in a material
Answer: refractive index.
Question 25: 5.14: An individual has the genotype AO, hh. What antigens would be present on the red
cells of this individual? (Obj 5, 9)
A. A only
B. A and H
C. A and O
D. none of the above
Answer: d) none of the above---.
Page 4
