Clinical Chemistry questions for the DHA lab exam.
Clinical Chemistry in the DHA lab exam covers glucose, electrolytes, enzymes, lipids, proteins and renal and liver function tests, together with the analytical methods and quality control behind them. Candidates should be able to interpret results, recognize common interferences and link abnormal patterns to the diseases that cause them.
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1,043
clinical chemistry practice questions
- 15%
- of the exam
- 8
- subtopics
- Oct 2026
- updated
Inside this topic.
The subtopics our clinical chemistry questions cover.
- Renal Function Tests
- Electrolytes
- Endocrinology
- Liver Function Tests
- Enzymes
- Acid–Base
- Lipids
- Proteins
Key facts to remember.
High-yield clinical chemistry points to revise before the exam.
- 1
Sodium fluoride (gray-top) tubes inhibit glycolysis, preventing a falsely low glucose when samples cannot be analyzed promptly.
- 2
Hemolysis falsely raises potassium, LDH and AST because these are present at much higher concentrations inside red cells than in plasma.
- 3
HbA1c reflects average blood glucose over roughly the previous 2 to 3 months, in line with the lifespan of red cells.
- 4
The Friedewald equation estimates LDL as total cholesterol minus HDL minus triglycerides/5 (in mg/dL); it is unreliable when triglycerides exceed 400 mg/dL.
- 5
Anion gap = Na+ - (Cl- + HCO3-); a raised anion gap metabolic acidosis is seen in diabetic ketoacidosis, lactic acidosis and renal failure.
Sample questions with answers.
10 practice questions for the DHA Medical Laboratory Technologist & Technician Licensing Examination - Dubai UAE (Clinical Chemistry). Pick an answer to see if you're right, with a full explanation.
Question 1
Which laboratory change is expected in respiratory acidosis?
Question 2
Which cardiac marker is useful for detecting reinfarction?
Question 3
Which analyte accumulates in renal failure due to reduced excretion?
Question 4
Which marker rises earliest after myocardial infarction?
Question 5
A decrease in serum albumin most directly affects:
Question 6
Which electrolyte is MOST affected by hemolysis?
Question 7
A delayed separation of serum from cells will MOST affect which analyte?
Question 8
Which electrolyte disorder is common in chronic alcoholism?
Question 9
Which laboratory parameter best reflects short-term glycemic control?
Question 10
Which analyte is falsely LOW in severe liver failure due to decreased synthesis?
Other topics in this exam.
Questions, answered
Practice the anion gap, calculated LDL, calculated serum osmolality (2 x Na + glucose/18 + BUN/2.8, in mg/dL) and creatinine clearance, as well as unit conversions such as glucose from mg/dL to mmol/L (divide by 18). Calculation questions are usually straightforward if you know the formula and watch the units. Writing each formula from memory a few times before the exam helps it stick.
A predominant rise in ALT and AST suggests hepatocellular injury, whereas a predominant rise in ALP with GGT suggests cholestasis or biliary obstruction. A raised ALP with a normal GGT points towards a bone source. Practice reading a full set of results together rather than one value at a time.
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All 1,043 clinical chemistry questions, with explanations and a readiness score for this topic.