Medical Laboratory Technician (MLT) exam
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
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1. What is the primary function of EDTA in a blood collection tube?
A. Promotes clotting
B. Preserves glucose
C. Prevents coagulation
D. Enhances bacterial growth
Prevents coagulation by binding calcium ions required for
clotting.
2. Which stain is commonly used for differential white blood cell
counts?
A. Gram stain
B. Acid-fast stain
C. Wright-Giemsa stain
D. India ink
Wright-Giemsa stain differentiates blood cell morphology and
WBC types.
3. The normal pH of blood is approximately:
A. 6.8
B. 7.0
C. 7.4
, D. 8.0
Blood is tightly regulated around pH 7.35–7.45.
4. Which organ produces erythropoietin?
A. Liver
B. Spleen
C. Kidneys
D. Pancreas
Kidneys release erythropoietin in response to hypoxia.
5. What is the primary purpose of centrifugation in lab work?
A. Sterilization
B. Separation of components by density
C. pH adjustment
D. Protein synthesis
Centrifugation separates blood into plasma, buffy coat, and
RBCs.
6. Which organism is Gram-positive?
A. E. coli
B. Salmonella
C. Staphylococcus aureus
D. Neisseria gonorrhoeae
S. aureus retains crystal violet stain.
7. The anticoagulant used in coagulation studies is:
A. EDTA
B. Heparin
C. Sodium citrate
D. Oxalate
Sodium citrate binds calcium reversibly for clotting tests.
, 8. What is the normal RBC count in adult males?
A. 2–3 million/µL
B. 3–4 million/µL
C. 4.5–6.0 million/µL
D. 7–8 million/µL
Normal male RBC range is about 4.7–6.1 million/µL.
9. Which test measures long-term glucose control?
A. Fasting glucose
B. Random glucose
C. HbA1c
D. OGTT
HbA1c reflects average glucose over 2–3 months.
10. Which bacteria causes tuberculosis?
A. Streptococcus pneumoniae
B. Mycobacterium tuberculosis
C. Staphylococcus epidermidis
D. E. coli
M. tuberculosis is acid-fast bacillus causing TB.
11. Urine specific gravity measures:
A. pH
B. Glucose
C. Concentration of solutes
D. Ketones
It reflects kidney concentrating ability.
12. Which cell is responsible for antibody production?
A. Neutrophil
B. Eosinophil
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. What is the primary function of EDTA in a blood collection tube?
A. Promotes clotting
B. Preserves glucose
C. Prevents coagulation
D. Enhances bacterial growth
Prevents coagulation by binding calcium ions required for
clotting.
2. Which stain is commonly used for differential white blood cell
counts?
A. Gram stain
B. Acid-fast stain
C. Wright-Giemsa stain
D. India ink
Wright-Giemsa stain differentiates blood cell morphology and
WBC types.
3. The normal pH of blood is approximately:
A. 6.8
B. 7.0
C. 7.4
, D. 8.0
Blood is tightly regulated around pH 7.35–7.45.
4. Which organ produces erythropoietin?
A. Liver
B. Spleen
C. Kidneys
D. Pancreas
Kidneys release erythropoietin in response to hypoxia.
5. What is the primary purpose of centrifugation in lab work?
A. Sterilization
B. Separation of components by density
C. pH adjustment
D. Protein synthesis
Centrifugation separates blood into plasma, buffy coat, and
RBCs.
6. Which organism is Gram-positive?
A. E. coli
B. Salmonella
C. Staphylococcus aureus
D. Neisseria gonorrhoeae
S. aureus retains crystal violet stain.
7. The anticoagulant used in coagulation studies is:
A. EDTA
B. Heparin
C. Sodium citrate
D. Oxalate
Sodium citrate binds calcium reversibly for clotting tests.
, 8. What is the normal RBC count in adult males?
A. 2–3 million/µL
B. 3–4 million/µL
C. 4.5–6.0 million/µL
D. 7–8 million/µL
Normal male RBC range is about 4.7–6.1 million/µL.
9. Which test measures long-term glucose control?
A. Fasting glucose
B. Random glucose
C. HbA1c
D. OGTT
HbA1c reflects average glucose over 2–3 months.
10. Which bacteria causes tuberculosis?
A. Streptococcus pneumoniae
B. Mycobacterium tuberculosis
C. Staphylococcus epidermidis
D. E. coli
M. tuberculosis is acid-fast bacillus causing TB.
11. Urine specific gravity measures:
A. pH
B. Glucose
C. Concentration of solutes
D. Ketones
It reflects kidney concentrating ability.
12. Which cell is responsible for antibody production?
A. Neutrophil
B. Eosinophil
