ARIZONA CLINICAL LABORATORY SCIENTIST QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE

ARIZONA CLINICAL LABORATORY SCIENTIST
QUESTIONS WITH CORRECT ANSWERS LATEST
2025-2026 UPDATE
1–10: Clinical Chemistry

1. Which test best evaluates long-term glucose control?
A. Random glucose
B. Fasting glucose
C. HbA1c
D. Oral glucose tolerance test
Answer: C
Rationale: HbA1c reflects average blood glucose over ~3 months.

2. The primary buffer system in blood is:
A. Phosphate buffer
B. Bicarbonate buffer
C. Protein buffer
D. Ammonia buffer
Answer: B
Rationale: Bicarbonate maintains blood pH homeostasis.

3. Increased anion gap is seen in:
A. Vomiting
B. Diarrhea
C. Diabetic ketoacidosis
D. Hyperventilation
Answer: C
Rationale: Ketoacids increase anion gap metabolic acidosis.

4. Troponin is used to diagnose:
A. Liver failure
B. Myocardial infarction
C. Kidney disease

, D. Pancreatitis
Answer: B

5. ALT is most specific for:
A. Heart
B. Brain
C. Liver
D. Kidney
Answer: C

6. Hypocalcemia causes:
A. Muscle weakness
B. Tetany
C. Hyperreflexia only
D. Bradycardia only
Answer: B

7. Most sensitive marker for acute pancreatitis:
A. AST
B. Amylase
C. Lipase
D. ALP
Answer: C

8. Which sample is best for glucose testing?
A. EDTA plasma
B. Serum without preservative
C. Fluoride plasma
D. Heparinized blood
Answer: C

9. Increased LDL is associated with:
A. Decreased heart disease risk
B. Atherosclerosis
C. Hypoglycemia