HEMATOLOGY EXAM WITH 140 QUESTIONS AND
ANSWERS NEWEST RATED A+ 2025/2026
Blood collected in EDTA undergoes which of the following changes if kept at room temperature for
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6-24 hours? - Correct Answers a. Increased hematocrit and MCV
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Il` To remove fresh blood from a lab coat you would: - Correct Answers c. Apply a 3% hydrogen
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Il` peroxide solution then rinse thoroughly with water Il` Il` Il` Il` Il` Il`
Il` Which of the following achromatic objectives would be an oil immersion objective: - Correct
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Il` Answers c. N.A. 1.25 Il` Il` Il` Il` Il` Il` Il`
Il` A blood smear from an infant was examined and it was discovered that there were 20 nucleated
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Il` erythrocytes for each 100 leukocytes counted. The observed WBC count as 3.6 x 109/L. What is Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` the corrected (true) leukocyte count? - Correct Answers b. 3.00 x 109/L
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Il` The diluent used for counting platelets by the Unopette method is: - Correct Answers c. 1%
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Il` ammonium oxalate Il`
Il` The principle of counting the cells using anoptical cell counter is: - Correct Answers c. based on
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Il` the scattering of light by cells
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Il` When a red blood cell count is performed on an electrical particle counter, the counter usually -
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Il` Correct Answers b. includes white blood cells Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` Cells are counted on the Coulter Counter as they pass through a path between two electrodes by
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Il` creating a - Correct Answers c. voltage decrease Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
,Il` You are performing a white blood cell count on a known leukemic patient. His WBC count usually
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Il` runs approximately 200 x 109/L. In order to count approximately 40 cells in each of the four "W"
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Il` squares, which of the following combinations of pipette and dilution would you choose? - Correct
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Il` Answers d. RBC pipette, blood to 0.2 Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` Coincidence refers to: - Correct Answers d. The simultaneous passage of more than one cell
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Il` through the aperture Il` Il`
Il` The light source on optical cell counters usually is a: - Correct Answers c. Laser beam
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Il` The reason for allowing the dilution made in a platelet unopette to sit for 10 minutes before
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Il` plating is: - Correct Answers c. to lyse red blood cells
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Il` The protein that is involved in the transport of iron in the plasma is: - Correct Answers c.
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Il` transferrin
Il` The largest quantity of body iron is found in the form of: - Correct Answers e. hemoglobin
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Il` In order for hemoglobin to bind properly with oxygen, the iron must have the following valence: -
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Il` Correct Answers b. +2 Il` Il` Il` Il` Il` Il` Il`
Il` The globin component of hemoglobin F - Correct Answers d. is composed of 2 alpha and 2
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Il` gamma chains Il`
Il` Methemoglobin contains a: - Correct Answers a. ferric form of iron Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` In hemoglobin S disease, there is a substitution of: - Correct Answers a. valine for glutamic acid
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, Il` What is the function of the enzyme methemoglobin reductase in a red cell? - Correct Answers a.
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Il` to keep iron in the ferrous state
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Il` Hemoglobinopathies such as HbS and C have abnormalities occurring in their: - Correct Answers Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
b. beta chains of globin
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Il` According to the laboratory procedure manual at General Hospital, hematocrits are to be spun at Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` 10,000 PRM for 4 minutes. A new employee centrifuged the hematocrits for only 2 minutes at
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Il` 5,000 RPM. The hematocrit value may be: - Correct Answers b. falsely increased
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Il` The stain used to visualize migration patterns in hemoglobin electrophoresis is: - Correct Answers
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e. Ponceau S
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Il` The difference in the charges of the various hemoglobins causing migration toward the anode or
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Il` cathode at different rates is caused by a variation in the: - Correct Answers b. amino acid
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Il` composition
Il` In cellulose acetate electrophoresis, adult hemoglobin (HbA1), migrates toward the anode: -
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Il` Correct Answers b. faster than Hb S Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` In which of the following conditions will the hemoglobin values be decreased? - Correct Answers
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b. pregnancy
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Il` Hgb = 10.5 g/dl Il` Il` Il`
Hct = 32% Il` Il`
RBC = 3.0 x 1012/L Il` Il` Il` Il`
The MCV (fl) is: - Correct Answers c. 107 Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
ANSWERS NEWEST RATED A+ 2025/2026
Blood collected in EDTA undergoes which of the following changes if kept at room temperature for
Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
6-24 hours? - Correct Answers a. Increased hematocrit and MCV
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Il` To remove fresh blood from a lab coat you would: - Correct Answers c. Apply a 3% hydrogen
Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` peroxide solution then rinse thoroughly with water Il` Il` Il` Il` Il` Il`
Il` Which of the following achromatic objectives would be an oil immersion objective: - Correct
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Il` Answers c. N.A. 1.25 Il` Il` Il` Il` Il` Il` Il`
Il` A blood smear from an infant was examined and it was discovered that there were 20 nucleated
Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` erythrocytes for each 100 leukocytes counted. The observed WBC count as 3.6 x 109/L. What is Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` the corrected (true) leukocyte count? - Correct Answers b. 3.00 x 109/L
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Il` The diluent used for counting platelets by the Unopette method is: - Correct Answers c. 1%
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Il` ammonium oxalate Il`
Il` The principle of counting the cells using anoptical cell counter is: - Correct Answers c. based on
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Il` the scattering of light by cells
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Il` When a red blood cell count is performed on an electrical particle counter, the counter usually -
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Il` Correct Answers b. includes white blood cells Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` Cells are counted on the Coulter Counter as they pass through a path between two electrodes by
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Il` creating a - Correct Answers c. voltage decrease Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
,Il` You are performing a white blood cell count on a known leukemic patient. His WBC count usually
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Il` runs approximately 200 x 109/L. In order to count approximately 40 cells in each of the four "W"
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Il` squares, which of the following combinations of pipette and dilution would you choose? - Correct
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Il` Answers d. RBC pipette, blood to 0.2 Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` Coincidence refers to: - Correct Answers d. The simultaneous passage of more than one cell
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Il` through the aperture Il` Il`
Il` The light source on optical cell counters usually is a: - Correct Answers c. Laser beam
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Il` The reason for allowing the dilution made in a platelet unopette to sit for 10 minutes before
Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` plating is: - Correct Answers c. to lyse red blood cells
Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` The protein that is involved in the transport of iron in the plasma is: - Correct Answers c.
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Il` transferrin
Il` The largest quantity of body iron is found in the form of: - Correct Answers e. hemoglobin
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Il` In order for hemoglobin to bind properly with oxygen, the iron must have the following valence: -
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Il` Correct Answers b. +2 Il` Il` Il` Il` Il` Il` Il`
Il` The globin component of hemoglobin F - Correct Answers d. is composed of 2 alpha and 2
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Il` gamma chains Il`
Il` Methemoglobin contains a: - Correct Answers a. ferric form of iron Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` In hemoglobin S disease, there is a substitution of: - Correct Answers a. valine for glutamic acid
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, Il` What is the function of the enzyme methemoglobin reductase in a red cell? - Correct Answers a.
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Il` to keep iron in the ferrous state
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Il` Hemoglobinopathies such as HbS and C have abnormalities occurring in their: - Correct Answers Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
b. beta chains of globin
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Il` According to the laboratory procedure manual at General Hospital, hematocrits are to be spun at Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` 10,000 PRM for 4 minutes. A new employee centrifuged the hematocrits for only 2 minutes at
Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` 5,000 RPM. The hematocrit value may be: - Correct Answers b. falsely increased
Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` The stain used to visualize migration patterns in hemoglobin electrophoresis is: - Correct Answers
Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
e. Ponceau S
Il` Il` Il` Il` Il` Il` Il`
Il` The difference in the charges of the various hemoglobins causing migration toward the anode or
Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` cathode at different rates is caused by a variation in the: - Correct Answers b. amino acid
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Il` composition
Il` In cellulose acetate electrophoresis, adult hemoglobin (HbA1), migrates toward the anode: -
Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` Correct Answers b. faster than Hb S Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
Il` In which of the following conditions will the hemoglobin values be decreased? - Correct Answers
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b. pregnancy
Il` Il` Il` Il`
Il` Hgb = 10.5 g/dl Il` Il` Il`
Hct = 32% Il` Il`
RBC = 3.0 x 1012/L Il` Il` Il` Il`
The MCV (fl) is: - Correct Answers c. 107 Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il` Il`
