Nevada Clinical Laboratory Scientist
Licensing Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. A clinical laboratory scientist is performing a complete blood count.
Which instrument principle is most commonly used to determine red
blood cell counts in automated hematology analyzers?
A. Spectrophotometry
B. Turbidimetry
C. Electrical impedance
D. Nephelometry
Electrical impedance counts cells by detecting changes in electrical
resistance as cells pass through an aperture, making it a common method
used in automated hematology analyzers for red blood cell counting.
2. Which anticoagulant is the preferred choice for routine hematology
testing including CBC analysis?
A. Sodium citrate
B. EDTA
C. Heparin
D. Potassium oxalate
EDTA preserves cellular morphology and prevents platelet clumping,
making it the anticoagulant of choice for complete blood counts and other
routine hematology analyses.
, 3. In clinical chemistry, which method is most commonly used to
measure serum glucose levels in automated analyzers?
A. Biuret reaction
B. Jaffe reaction
C. Glucose oxidase method
D. Nesslerization
The glucose oxidase method is widely used because it specifically oxidizes
glucose to produce hydrogen peroxide, which can be measured
colorimetrically for accurate glucose quantification.
4. A patient with iron deficiency anemia would most likely show which
laboratory finding?
A. Increased MCV
B. Increased serum ferritin
C. Decreased transferrin saturation
D. Increased serum iron
Iron deficiency anemia typically presents with low serum iron and
decreased transferrin saturation due to reduced iron availability for
hemoglobin synthesis.
5. Which white blood cell type is most commonly elevated during acute
bacterial infections?
A. Eosinophils
B. Basophils
C. Lymphocytes
D. Neutrophils
Neutrophils are the primary responders to bacterial infections and typically
increase significantly during acute bacterial inflammatory processes.
6. In blood banking, which test detects antibodies attached to red blood
cells in vivo?
A. Indirect antiglobulin test
B. Direct antiglobulin test
, C. Coombs crossmatch
D. Antibody screening test
The direct antiglobulin test detects antibodies or complement proteins
already bound to red blood cells within the patient’s circulation.
7. Which microorganism is most commonly associated with urinary tract
infections?
A. Staphylococcus aureus
B. Escherichia coli
C. Streptococcus pyogenes
D. Pseudomonas aeruginosa
Escherichia coli is responsible for the majority of community-acquired
urinary tract infections due to its ability to adhere to urinary tract
epithelial cells.
8. Which stain is routinely used for differential white blood cell counts in
hematology?
A. Gram stain
B. Acid-fast stain
C. Wright-Giemsa stain
D. Wright stain
Wright stain is commonly used to visualize blood cell morphology and
differentiate leukocyte types in peripheral blood smears.
9. Which biochemical marker is most specific for myocardial injury?
A. CK-MM
B. Myoglobin
C. Cardiac troponin I
D. Lactate dehydrogenase
Cardiac troponin I is highly specific and sensitive for myocardial injury and
is considered the gold standard biomarker for diagnosing myocardial
infarction.
Licensing Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. A clinical laboratory scientist is performing a complete blood count.
Which instrument principle is most commonly used to determine red
blood cell counts in automated hematology analyzers?
A. Spectrophotometry
B. Turbidimetry
C. Electrical impedance
D. Nephelometry
Electrical impedance counts cells by detecting changes in electrical
resistance as cells pass through an aperture, making it a common method
used in automated hematology analyzers for red blood cell counting.
2. Which anticoagulant is the preferred choice for routine hematology
testing including CBC analysis?
A. Sodium citrate
B. EDTA
C. Heparin
D. Potassium oxalate
EDTA preserves cellular morphology and prevents platelet clumping,
making it the anticoagulant of choice for complete blood counts and other
routine hematology analyses.
, 3. In clinical chemistry, which method is most commonly used to
measure serum glucose levels in automated analyzers?
A. Biuret reaction
B. Jaffe reaction
C. Glucose oxidase method
D. Nesslerization
The glucose oxidase method is widely used because it specifically oxidizes
glucose to produce hydrogen peroxide, which can be measured
colorimetrically for accurate glucose quantification.
4. A patient with iron deficiency anemia would most likely show which
laboratory finding?
A. Increased MCV
B. Increased serum ferritin
C. Decreased transferrin saturation
D. Increased serum iron
Iron deficiency anemia typically presents with low serum iron and
decreased transferrin saturation due to reduced iron availability for
hemoglobin synthesis.
5. Which white blood cell type is most commonly elevated during acute
bacterial infections?
A. Eosinophils
B. Basophils
C. Lymphocytes
D. Neutrophils
Neutrophils are the primary responders to bacterial infections and typically
increase significantly during acute bacterial inflammatory processes.
6. In blood banking, which test detects antibodies attached to red blood
cells in vivo?
A. Indirect antiglobulin test
B. Direct antiglobulin test
, C. Coombs crossmatch
D. Antibody screening test
The direct antiglobulin test detects antibodies or complement proteins
already bound to red blood cells within the patient’s circulation.
7. Which microorganism is most commonly associated with urinary tract
infections?
A. Staphylococcus aureus
B. Escherichia coli
C. Streptococcus pyogenes
D. Pseudomonas aeruginosa
Escherichia coli is responsible for the majority of community-acquired
urinary tract infections due to its ability to adhere to urinary tract
epithelial cells.
8. Which stain is routinely used for differential white blood cell counts in
hematology?
A. Gram stain
B. Acid-fast stain
C. Wright-Giemsa stain
D. Wright stain
Wright stain is commonly used to visualize blood cell morphology and
differentiate leukocyte types in peripheral blood smears.
9. Which biochemical marker is most specific for myocardial injury?
A. CK-MM
B. Myoglobin
C. Cardiac troponin I
D. Lactate dehydrogenase
Cardiac troponin I is highly specific and sensitive for myocardial injury and
is considered the gold standard biomarker for diagnosing myocardial
infarction.
