ASCP MLT MEDICAL LAB TECHNICIAN EXAM |ALL
PRACTICE Q&A 2026/2027 | A+ GRADED |
COMPREHENSIVE EXAM GUIDE 2026&2027
1. A patient’s complete blood count shows a hemoglobin of 8.2 g/dL, hematocrit of
25%, MCV of 68 fL, and an increased RDW. Which additional laboratory finding
would most strongly support iron deficiency anemia?
A. Increased serum ferritin
B. Decreased total iron-binding capacity
C. Decreased serum ferritin
D. Increased serum iron
Answer: C
Low ferritin reflects depleted iron stores and strongly supports iron deficiency. Microcytosis,
hypochromia, and increased RDW are also typical findings.
2. A peripheral blood smear from a patient with severe anemia demonstrates
numerous target cells. Which condition is most strongly associated with this
morphology?
A. Hereditary spherocytosis
B. Thalassemia
C. Autoimmune hemolytic anemia
D. Iron deficiency anemia
Answer: B
Target cells are particularly prominent in thalassemia and may also occur in liver disease and
hemoglobinopathies.
3. A technologist reviews a CBC specimen and observes platelet clumping in the EDTA
tube. The automated analyzer reports a platelet count of 72 × 10⁹/L. What is the
most appropriate next step?
A. Report the platelet count immediately
B. Centrifuge the specimen again
C. Request a sodium citrate specimen
D. Warm the EDTA specimen to 37°C
Answer: C
EDTA-dependent platelet clumping can produce pseudothrombocytopenia. A citrate specimen
can help obtain a more accurate platelet count.
, 4. Which leukocyte is normally characterized by a multilobed nucleus and fine, pale
granules?
A. Neutrophil
B. Eosinophil
C. Basophil
D. Monocyte
Answer: A
Mature neutrophils have segmented nuclei and fine cytoplasmic granules that are typically
pale lilac with routine Romanowsky staining.
5. A patient has a markedly increased absolute eosinophil count. Which clinical
condition is most consistent with this finding?
A. Acute bacterial infection
B. Parasitic infection
C. Aplastic anemia
D. Viral suppression
Answer: B
Eosinophilia is commonly associated with tissue-invasive parasitic infections and allergic
disorders.
6. A peripheral smear demonstrates numerous spherocytes without central pallor.
Which test would best help distinguish hereditary spherocytosis from an immune-
mediated hemolytic process?
A. Sickling test
B. Direct antiglobulin test
C. Reticulocyte stain
D. Hemoglobin electrophoresis
Answer: B
A direct antiglobulin test helps identify antibody or complement coating of red cells,
supporting immune-mediated hemolysis.
7. Which red blood cell inclusion contains aggregated ribosomal RNA and is best
demonstrated with a supravital stain?
A. Howell-Jolly body
B. Pappenheimer body
C. Heinz body
D. Basophilic stippling
Answer: C
,Heinz bodies are denatured hemoglobin precipitates that require supravital staining for
optimal visualization.
8. A patient with suspected sickle cell disease has a hemoglobin electrophoresis
performed. Which hemoglobin pattern is most consistent with homozygous
hemoglobin S disease in an untreated patient?
A. Predominantly Hb A
B. Hb A and Hb S in approximately equal proportions
C. Predominantly Hb S with increased Hb F and no Hb A
D. Hb A2 as the predominant fraction
Answer: C
HbSS patients generally have predominantly Hb S, variable Hb F, and no significant Hb A
because they do not produce normal beta chains.
9. A reticulocyte count is 8% in a patient with severe anemia. Why should the
reticulocyte percentage be corrected before interpreting marrow response?
A. Reticulocytes are counted only in serum
B. Anemia changes the proportion of circulating red cells represented by reticulocytes
C. Reticulocytes cannot be detected microscopically
D. Hemoglobin concentration directly destroys reticulocytes
Answer: B
The uncorrected reticulocyte percentage may overestimate marrow production in anemia
because the denominator of circulating red cells is reduced.
10. Which finding is most characteristic of megaloblastic anemia caused by vitamin B12
deficiency?
A. Microcytosis and low MCV
B. Macro-ovalocytes and hypersegmented neutrophils
C. Target cells and rouleaux
D. Spherocytes and polychromasia
Answer: B
Vitamin B12 deficiency produces impaired DNA synthesis, resulting in macro-ovalocytes and
hypersegmented neutrophils.
11. A patient has macrocytosis, neurologic symptoms, and an elevated methylmalonic
acid concentration. Which deficiency is most likely?
A. Iron
B. Folate
C. Vitamin B12
D. Vitamin B6
, Answer: C
Methylmalonic acid increases in vitamin B12 deficiency and is useful for distinguishing it from
isolated folate deficiency.
12. Which red cell morphology is most strongly associated with severe iron deficiency?
A. Microcytic hypochromic cells
B. Macrocytic cells
C. Spherocytes
D. Normocytic cells with basophilic stippling only
Answer: A
Iron deficiency commonly causes microcytosis and hypochromia, often accompanied by
increased anisocytosis.
13. A bone marrow aspirate is markedly hypocellular with replacement of normal
marrow elements by fat. Which condition is most consistent with this finding?
A. Aplastic anemia
B. Iron deficiency anemia
C. Polycythemia vera
D. Acute blood loss
Answer: A
Aplastic anemia is characterized by hypocellular marrow and pancytopenia resulting from
failure of hematopoietic production.
14. A patient has persistent erythrocytosis, low serum erythropoietin, and a positive
JAK2 mutation. Which disorder is most likely?
A. Secondary polycythemia
B. Polycythemia vera
C. Iron deficiency anemia
D. Relative erythrocytosis
Answer: B
Polycythemia vera is a myeloproliferative neoplasm commonly associated with JAK2
mutations and suppressed erythropoietin.
15. A peripheral smear from a patient with chronic myeloid leukemia is most likely to
demonstrate which pattern?
A. Only mature lymphocytes
B. A complete absence of neutrophils
C. Granulocytes at various stages of maturation
D. Predominantly plasma cells
PRACTICE Q&A 2026/2027 | A+ GRADED |
COMPREHENSIVE EXAM GUIDE 2026&2027
1. A patient’s complete blood count shows a hemoglobin of 8.2 g/dL, hematocrit of
25%, MCV of 68 fL, and an increased RDW. Which additional laboratory finding
would most strongly support iron deficiency anemia?
A. Increased serum ferritin
B. Decreased total iron-binding capacity
C. Decreased serum ferritin
D. Increased serum iron
Answer: C
Low ferritin reflects depleted iron stores and strongly supports iron deficiency. Microcytosis,
hypochromia, and increased RDW are also typical findings.
2. A peripheral blood smear from a patient with severe anemia demonstrates
numerous target cells. Which condition is most strongly associated with this
morphology?
A. Hereditary spherocytosis
B. Thalassemia
C. Autoimmune hemolytic anemia
D. Iron deficiency anemia
Answer: B
Target cells are particularly prominent in thalassemia and may also occur in liver disease and
hemoglobinopathies.
3. A technologist reviews a CBC specimen and observes platelet clumping in the EDTA
tube. The automated analyzer reports a platelet count of 72 × 10⁹/L. What is the
most appropriate next step?
A. Report the platelet count immediately
B. Centrifuge the specimen again
C. Request a sodium citrate specimen
D. Warm the EDTA specimen to 37°C
Answer: C
EDTA-dependent platelet clumping can produce pseudothrombocytopenia. A citrate specimen
can help obtain a more accurate platelet count.
, 4. Which leukocyte is normally characterized by a multilobed nucleus and fine, pale
granules?
A. Neutrophil
B. Eosinophil
C. Basophil
D. Monocyte
Answer: A
Mature neutrophils have segmented nuclei and fine cytoplasmic granules that are typically
pale lilac with routine Romanowsky staining.
5. A patient has a markedly increased absolute eosinophil count. Which clinical
condition is most consistent with this finding?
A. Acute bacterial infection
B. Parasitic infection
C. Aplastic anemia
D. Viral suppression
Answer: B
Eosinophilia is commonly associated with tissue-invasive parasitic infections and allergic
disorders.
6. A peripheral smear demonstrates numerous spherocytes without central pallor.
Which test would best help distinguish hereditary spherocytosis from an immune-
mediated hemolytic process?
A. Sickling test
B. Direct antiglobulin test
C. Reticulocyte stain
D. Hemoglobin electrophoresis
Answer: B
A direct antiglobulin test helps identify antibody or complement coating of red cells,
supporting immune-mediated hemolysis.
7. Which red blood cell inclusion contains aggregated ribosomal RNA and is best
demonstrated with a supravital stain?
A. Howell-Jolly body
B. Pappenheimer body
C. Heinz body
D. Basophilic stippling
Answer: C
,Heinz bodies are denatured hemoglobin precipitates that require supravital staining for
optimal visualization.
8. A patient with suspected sickle cell disease has a hemoglobin electrophoresis
performed. Which hemoglobin pattern is most consistent with homozygous
hemoglobin S disease in an untreated patient?
A. Predominantly Hb A
B. Hb A and Hb S in approximately equal proportions
C. Predominantly Hb S with increased Hb F and no Hb A
D. Hb A2 as the predominant fraction
Answer: C
HbSS patients generally have predominantly Hb S, variable Hb F, and no significant Hb A
because they do not produce normal beta chains.
9. A reticulocyte count is 8% in a patient with severe anemia. Why should the
reticulocyte percentage be corrected before interpreting marrow response?
A. Reticulocytes are counted only in serum
B. Anemia changes the proportion of circulating red cells represented by reticulocytes
C. Reticulocytes cannot be detected microscopically
D. Hemoglobin concentration directly destroys reticulocytes
Answer: B
The uncorrected reticulocyte percentage may overestimate marrow production in anemia
because the denominator of circulating red cells is reduced.
10. Which finding is most characteristic of megaloblastic anemia caused by vitamin B12
deficiency?
A. Microcytosis and low MCV
B. Macro-ovalocytes and hypersegmented neutrophils
C. Target cells and rouleaux
D. Spherocytes and polychromasia
Answer: B
Vitamin B12 deficiency produces impaired DNA synthesis, resulting in macro-ovalocytes and
hypersegmented neutrophils.
11. A patient has macrocytosis, neurologic symptoms, and an elevated methylmalonic
acid concentration. Which deficiency is most likely?
A. Iron
B. Folate
C. Vitamin B12
D. Vitamin B6
, Answer: C
Methylmalonic acid increases in vitamin B12 deficiency and is useful for distinguishing it from
isolated folate deficiency.
12. Which red cell morphology is most strongly associated with severe iron deficiency?
A. Microcytic hypochromic cells
B. Macrocytic cells
C. Spherocytes
D. Normocytic cells with basophilic stippling only
Answer: A
Iron deficiency commonly causes microcytosis and hypochromia, often accompanied by
increased anisocytosis.
13. A bone marrow aspirate is markedly hypocellular with replacement of normal
marrow elements by fat. Which condition is most consistent with this finding?
A. Aplastic anemia
B. Iron deficiency anemia
C. Polycythemia vera
D. Acute blood loss
Answer: A
Aplastic anemia is characterized by hypocellular marrow and pancytopenia resulting from
failure of hematopoietic production.
14. A patient has persistent erythrocytosis, low serum erythropoietin, and a positive
JAK2 mutation. Which disorder is most likely?
A. Secondary polycythemia
B. Polycythemia vera
C. Iron deficiency anemia
D. Relative erythrocytosis
Answer: B
Polycythemia vera is a myeloproliferative neoplasm commonly associated with JAK2
mutations and suppressed erythropoietin.
15. A peripheral smear from a patient with chronic myeloid leukemia is most likely to
demonstrate which pattern?
A. Only mature lymphocytes
B. A complete absence of neutrophils
C. Granulocytes at various stages of maturation
D. Predominantly plasma cells
