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Sample EHPLE Medical Laboratory Practice Questions

Try these sample questions to review concepts for the EHPLE Medical Laboratory exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In the clinical chemistry laboratory, which reagent reaction serves as the classic basis for the Jaffe method to measure serum creatinine?
A.Reaction of creatinine with alkaline picrate to form a red-orange Janovski complex
B.Oxidation of creatinine by hydrogen peroxide following urease hydrolysis
C.Reaction of creatinine with diacetyl monoxime under strongly acidic conditions
D.Reduction of phosphotungstic acid by creatinine in an alkaline carbonate medium
Explanation: The Jaffe reaction is the traditional colorimetric method for creatinine determination, in which creatinine reacts with alkaline picrate (picric acid in sodium hydroxide) to yield a red-orange Janovski complex measured spectrophotometrically at 500 to 520 nm. Although susceptible to non-creatinine chromogens such as glucose, acetoacetate, and cephalosporins, rate-blanked and kinetic modifications remain widely utilized across automated laboratory analyzers.
2A laboratory receives an order to evaluate renal clearance in a patient with fluctuating muscle mass and borderline renal impairment. Which endogenous serum biomarker is less dependent on muscle mass and diet than creatinine for estimating glomerular filtration rate (eGFR)?
A.Blood urea nitrogen (BUN)
B.Cystatin C
C.Beta-2 microglobulin
D.Serum uric acid
Explanation: Cystatin C is a low-molecular-weight (13 kDa) cysteine proteinase inhibitor produced at a constant rate by all nucleated cells. It is freely filtered by the glomerulus, completely reabsorbed and catabolized by proximal tubular epithelial cells, and unlike creatinine, is largely independent of muscle mass, age, sex, and dietary protein intake.
3When assessing hepatocellular damage on a hepatic panel, why is alanine aminotransferase (ALT) considered a more specific indicator of acute liver injury than aspartate aminotransferase (AST)?
A.AST has a substantially longer plasma half-life than ALT, leading to delayed systemic clearance
B.ALT is an exclusively mitochondrial enzyme, whereas AST is strictly cytosolic
C.ALT is localized predominantly in hepatocytes, whereas AST is abundant in myocardium, skeletal muscle, and erythrocytes
D.In vitro hemolysis releases large quantities of ALT while leaving AST levels unchanged
Explanation: Alanine aminotransferase (ALT) is found in highest concentrations in the cytoplasm of hepatocytes, making it highly specific for liver parenchymal damage. In contrast, aspartate aminotransferase (AST) is abundant in skeletal muscle, cardiac myocardium, kidneys, brain, and red blood cells; thus, non-hepatic processes such as myocardial infarction, rhabdomyolysis, and in vitro hemolysis elevate AST substantially.
4A patient presents with an isolated elevation of serum alkaline phosphatase (ALP) with normal transaminases. Which additional test should the laboratory suggest to determine whether the elevated ALP originates from the hepatobiliary tract or bone tissue?
A.Serum amylase
B.Lactate dehydrogenase (LDH)
C.Serum lipase
D.Gamma-glutamyl transferase (GGT)
Explanation: Gamma-glutamyl transferase (GGT) is elevated in hepatobiliary disorders, particularly biliary obstruction and cholestasis, but is not present in significant amounts in bone tissue. Therefore, a concurrent elevation of GGT confirms a hepatic origin for an elevated alkaline phosphatase, whereas a normal GGT indicates that the isolated ALP elevation is skeletal (such as in Paget disease, osteomalacia, or rapid adolescent bone growth).
5In the classic Jendrassik-Grof method for total bilirubin determination, which reagent serves as the accelerator to solubilize unconjugated (indirect) bilirubin so it can react with diazotized sulfanilic acid?
A.Caffeine-sodium benzoate
B.Methanol at 50% concentration
C.Dimethyl sulfoxide (DMSO)
D.Glacial acetic acid
Explanation: In the Jendrassik-Grof bilirubin procedure, caffeine-sodium benzoate acts as an accelerator that detaches unconjugated bilirubin from albumin, permitting it to react rapidly with diazotized sulfanilic acid to yield azobilirubin. The Malloy-Evelyn method historically used 50% methanol as the accelerator, but Jendrassik-Grof is favored in modern automated systems due to greater sensitivity, lower turbidity, and minimal interference from hemoglobin.
6A 58-year-old male arrives at the emergency department with acute retrosternal chest pain that began 4 hours ago. What is the typical kinetic profile of cardiac troponin I (cTnI) following an acute myocardial infarction?
A.Rises within 1 to 2 hours, peaks at 6 hours, and returns to baseline within 24 hours
B.Rises within 3 to 6 hours, peaks between 12 and 24 hours, and remains elevated for 7 to 10 days
C.Rises within 12 to 24 hours, peaks at 48 hours, and normalizes by day 3
D.Rises within 24 to 48 hours, peaks at 72 hours, and persists for 3 weeks
Explanation: Cardiac troponins (cTnI and cTnT) are structural regulatory proteins of the cardiomyocyte contractile apparatus released upon myocyte necrosis. Detectable circulating levels appear within 3 to 6 hours post-infarction, reach peak concentrations at 12 to 24 hours, and remain elevated for 7 to 10 days (or up to 14 days for cTnT), providing an extended diagnostic window.
7A hospitalized patient who experienced an acute myocardial infarction 4 days ago develops recurrent severe chest pain. Total CK is 420 U/L (reference: 38-174 U/L) and CK-MB mass is 28 ng/mL (reference: 0-5 ng/mL). What is the calculated CK-MB relative index, and does it support acute re-infarction?
A.Relative index is 15.0%; indicates severe skeletal muscle trauma rather than myocardial necrosis
B.Relative index is 1.5%; rules out myocardial re-infarction because it is below the 2.5% diagnostic threshold
C.Relative index is 6.7%; confirms myocardial re-infarction because it exceeds the 2.5% to 3.0% threshold
D.Relative index is 0.07%; non-diagnostic due to an uncorrected mathematical dilution artifact
Explanation: The CK-MB relative index is calculated as: (CK-MB in ng/mL / Total CK in U/L) * 100. Here, (28 / 420) * 100 = 6.67% (approximately 6.7%). A relative index greater than 2.5% to 3.0% indicates that the elevated CK-MB originates from myocardium rather than skeletal muscle, confirming acute myocardial re-infarction, which CK-MB detects well because it returns to baseline within 48 to 72 hours unlike troponin.
8According to national and international clinical guidelines, which fasting plasma glucose threshold measured on two separate occasions is diagnostic of diabetes mellitus?
A.≥ 100 mg/dL (5.6 mmol/L)
B.≥ 110 mg/dL (6.1 mmol/L)
C.≥ 140 mg/dL (7.8 mmol/L)
D.≥ 126 mg/dL (7.0 mmol/L)
Explanation: The diagnostic threshold for diabetes mellitus using fasting plasma glucose (after an 8-hour fast) is ≥ 126 mg/dL (7.0 mmol/L), confirmed on repeat testing in the absence of unequivocal acute hyperglycemia. Fasting values between 100 and 125 mg/dL (5.6 to 6.9 mmol/L) are classified as impaired fasting glucose (prediabetes).
9A patient with chronic sickle cell trait (HbAS) who recently experienced an episode of acute autoimmune hemolytic anemia presents for diabetic monitoring. Why might this patient's measured glycated hemoglobin (HbA1c) be falsely decreased relative to their actual glycemic control?
A.Shortened erythrocyte survival reduces the cumulative exposure time of hemoglobin to ambient plasma glucose
B.Elevated serum free hemoglobin irreversibly inhibits the cation-exchange chromatography column
C.Accelerated compensatory reticulocytosis enhances non-enzymatic glycation of intracellular hemoglobin
D.Elevated unconjugated bilirubin competitively binds to the N-terminal valine of beta globin chains
Explanation: Glycated hemoglobin (HbA1c) reflects the average circulating blood glucose concentration over the preceding 8 to 12 weeks, which depends directly on a normal erythrocyte lifespan of approximately 120 days. In hemolytic anemia, premature RBC destruction and subsequent compensatory reticulocytosis result in a younger circulating erythrocyte population with decreased cumulative glucose exposure, causing falsely low HbA1c values.
10According to the Beer-Lambert law in clinical spectrophotometry, what is the mathematical relationship between absorbance (A) and percent transmittance (%T)?
A.A = log(%T) - 2
B.A = 2 - log(%T)
C.A = 100 / %T
D.A = 2 * log(%T)
Explanation: Absorbance is defined as the negative logarithm of transmittance: A = -log(T) = -log(%T / 100) = log(100) - log(%T) = 2 - log(%T). This logarithmic transformation converts the inverse exponential relationship of light transmission through a solution into a linear relationship directly proportional to analyte concentration.

About the EHPLE Medical Laboratory Exam

Prepare for the Ethiopian Health Professionals Licensing Examination (EHPLE) for Medical Laboratory Science with our free 100-question practice exam. Administered by the Federal Ministry of Health (MoH) Health and Health-related Institutions and Professionals Regulatory Lead Executive Office (HHrIPR-LEO), the EHPLE evaluates graduating and practicing medical laboratory professionals against national standards. This practice bank covers all six core blueprint domains: clinical chemistry, medical microbiology, hematology and hemostasis, medical parasitology, immunology and immunohematology, and laboratory quality assurance and safety. Note: This is an independent study tool designed to reinforce core clinical competencies, not an official MoH examination paper.

Exam sponsor: Federal Ministry of Health (MoH) — Health and Health-related Institutions and Professionals Regulatory Lead Executive Office (HHrIPR-LEO). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

The MoH Implementation Guideline allots roughly 1.25 minutes per question and caps a single block at 120 questions / 2 hours 30 minutes, followed by a break of at least 30 minutes before the second block. A 200-item sitting is therefore delivered as a morning and an afternoon block of 100 questions each.

Time Limit

Two 100-question blocks with a break of at least 30 minutes

Passing Score

Set each round by an expert panel using the Modified-Angoff method (no fixed percentage)

Exam / Certification Fees

Not published by MoH as a fixed public tariff. A registration fee is paid through the official portal (hple.moh.gov.et); candidates who miss a sitting without an accepted reason pay the registration fee plus a 50% penalty (MoH Exam Administration Manual). Confirm the current amount on the registration announcement.

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

75.5%

Patient Care

Bacteriology (11%), hematology (11%), clinical chemistry (10%), urine and body fluids analysis (10%), medical parasitology (10%), serology (5%), immunohematology (4%), medical virology (3%), molecular biology (3%), introduction to medical laboratory sciences (2.8%), mycology (2.7%), instrumentation (2%), and histopathology (1%).

5.5%

Health Promotion and Disease Prevention

Community health assessment and intervention (2.5%), public health microbiology (2%), and vector biology (1%).

5.3%

Laboratory Quality Assurance and Safety Care

Quality assurance (4%) and safety in the clinical laboratory (1.3%).

5%

Scholar

Research (3%) and evidence-based practice (2%).

5%

Leadership and Management

Leadership and health system management (2.5%) and health laboratory management (2.5%).

3.7%

Professionalism

Ethical principles, communication, collaboration, and standards of professional conduct.

Preparing for the EHPLE Medical Laboratory Exam

What You Need to Know

  • Passing score: Set each round by an expert panel using the Modified-Angoff method (no fixed percentage)
  • Assessment: The MoH Implementation Guideline allots roughly 1.25 minutes per question and caps a single block at 120 questions / 2 hours 30 minutes, followed by a break of at least 30 minutes before the second block. A 200-item sitting is therefore delivered as a morning and an afternoon block of 100 questions each.
  • Time limit: Two 100-question blocks with a break of at least 30 minutes
  • Exam / certification fees: Not published by MoH as a fixed public tariff. A registration fee is paid through the official portal (hple.moh.gov.et); candidates who miss a sitting without an accepted reason pay the registration fee plus a 50% penalty (MoH Exam Administration Manual). Confirm the current amount on the registration announcement. Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

EHPLE Medical Laboratory: Suggested Study Strategy

1Master blood parasite morphology, particularly distinguishing Plasmodium falciparum ring forms and crescent gametocytes from Plasmodium vivax amoeboid trophozoites and Schüffner's dots.
2Memorize Westgard multirules (1-2s, 1-3s, 2-2s, R-4s, 4-1s, 10-x) and learn to classify violations as random errors (imprecision) or systematic errors (drift/shift).
3Understand pre-analytical, analytical, and post-analytical sources of error, including sample hemolysis, lipemia, EDTA tube contamination, and proper anticoagulant ratios.
4Review the coagulation cascade and the clinical significance of isolated prolonged PT vs. prolonged aPTT vs. combined prolongation in liver disease, hemophilia, and anticoagulant therapy.
5Familiarize yourself with microbiological identification workflows, including Gram stains, catalase and coagulase tests for Gram-positive cocci, and TSI/indole/oxidase reactions for Enterobacteriaceae.

Frequently Asked Questions

What is the EHPLE Medical Laboratory Science examination?

The Ethiopian Health Professionals Licensing Examination (EHPLE) for Medical Laboratory Science is a mandatory national licensure assessment administered by the Federal Ministry of Health (MoH) through the Health and Health-related Institutions and Professionals Regulatory Lead Executive Office (HHrIPR-LEO). It verifies that BSc graduates possess the knowledge, diagnostic judgment, and technical competence needed to practice safely as licensed medical laboratory professionals in Ethiopia.

What is the format and duration of the official EHPLE exam?

The official examination consists of 200 four-option, single-best-answer multiple-choice questions delivered as a morning and an afternoon block of 100 questions each, with a break of at least 30 minutes between them. The MoH Implementation Guideline allots roughly 1.25 minutes per question and caps any single block at 120 questions. Discipline Information Booklets state that the mode of administration is computer-based testing at MoH-designated higher education institutions across Ethiopia.

How is the passing score determined for the EHPLE?

The pass mark is not a fixed percentage. Instead, it is established for each examination round using the Modified Angoff standard-setting methodology, where a panel of national clinical laboratory experts evaluates each item to determine the expected performance of a minimally competent practitioner.

What major topic areas are covered in the Medical Laboratory Science blueprint?

The blueprint covers six major disciplines: Clinical Chemistry (~20%), Medical Microbiology (~20%), Hematology & Hemostasis (~20%), Medical Parasitology (~15%), Immunology & Immunohematology (~15%), and Laboratory Quality Assurance & Safety Management (~10%).

How should candidates prepare for the EHPLE Medical Laboratory examination?

Candidates should review standard undergraduate clinical laboratory textbooks, national diagnostic guidelines (including Ethiopian malaria and TB diagnosis manuals), laboratory biosafety standards, and practice multiple-choice questions that reinforce differential diagnosis, quality control rules, and specimen troubleshooting.

Are these practice questions an official EHPLE paper?

No. The EHPLE is set and delivered only by the Federal Ministry of Health; these questions are an independent study aid written against the official Information Booklet blueprint and Ethiopian national clinical guidelines. The official examination is delivered in English as computer-based, four-option, single-best-answer MCQs, so the item format here matches the real assessment, but this bank is not an official past paper, a released item pool, or a simulation of the live testing environment. Always confirm registration dates, fees, and exam-day rules on moh.gov.et/ehple and hple.moh.gov.et.