Practice exam questions with explanations
Single-best-answer practice questions for USMLE and other medical licensing exams — every question with a full explanation and a cited source.
- Biochemistry3 questions
- Emergency medicine3 questions
- Immunology3 questions
- Internal medicine4 questions
- Microbiology4 questions
- Neurology2 questions
- Obstetrics and gynecology3 questions
- Pathology4 questions
- Pediatrics3 questions
- Pharmacology4 questions
- Physiology3 questions
- Psychiatry2 questions
- Surgery2 questions
Exam
Specialty
- PhenylketonuriaBiochemistry · USMLE Step 1 · easy
- Thiamine deficiencyBiochemistry · USMLE Step 1 · medium
- Glycogen storage disease type IBiochemistry · USMLE Step 1 · medium
- Acetaminophen poisoningEmergency medicine · USMLE Step 2 CK · easy
- AnaphylaxisEmergency medicine · USMLE Step 2 CK · easy
- Tension pneumothoraxEmergency medicine · USMLE Step 2 CK · easy
- Type IV hypersensitivityImmunology · USMLE Step 1 · easy
- DiGeorge syndromeImmunology · USMLE Step 1 · easy
- X-linked agammaglobulinemiaImmunology · USMLE Step 1 · easy
- Colorectal cancer screeningInternal medicine · USMLE Step 2 CK · easy
- Diabetic ketoacidosisInternal medicine · USMLE Step 2 CK · medium
- HyperkalemiaInternal medicine · USMLE Step 2 CK · easy
- Community-acquired pneumoniaInternal medicine · USMLE Step 2 CK · medium
- GiardiasisMicrobiology · USMLE Step 1 · easy
- Infectious mononucleosisMicrobiology · USMLE Step 1 · easy
- ListeriosisMicrobiology · USMLE Step 1 · medium
- Pneumococcal infectionMicrobiology · USMLE Step 1 · easy
- Acute ischemic strokeNeurology · USMLE Step 2 CK · medium
- Guillain-Barré syndromeNeurology · USMLE Step 2 CK · easy
- Postpartum hemorrhageObstetrics and gynecology · USMLE Step 2 CK · easy
- Preeclampsia with severe featuresObstetrics and gynecology · USMLE Step 2 CK · easy
- Rh alloimmunization preventionObstetrics and gynecology · USMLE Step 2 CK · easy
- AmyloidosisPathology · USMLE Step 1 · easy
- Celiac diseasePathology · USMLE Step 1 · easy
- Hodgkin lymphomaPathology · USMLE Step 1 · medium
- Hereditary hemochromatosisPathology · USMLE Step 1 · easy
- IntussusceptionPediatrics · USMLE Step 2 CK · easy
- Kawasaki diseasePediatrics · USMLE Step 2 CK · easy
- Hypertrophic pyloric stenosisPediatrics · USMLE Step 2 CK · easy
- ACE inhibitor angioedemaPharmacology · USMLE Step 1 · medium
- MetforminPharmacology · USMLE Step 1 · easy
- Organophosphate poisoningPharmacology · USMLE Step 1 · medium
- WarfarinPharmacology · USMLE Step 1 · easy
- Carbon monoxide poisoningPhysiology · USMLE Step 1 · medium
- Primary aldosteronismPhysiology · USMLE Step 1 · medium
- SIADHPhysiology · USMLE Step 1 · medium
- Lithium toxicityPsychiatry · USMLE Step 2 CK · medium
- Neuroleptic malignant syndromePsychiatry · USMLE Step 2 CK · medium
- Acute cholangitisSurgery · USMLE Step 2 CK · medium
- Acute mesenteric ischemiaSurgery · USMLE Step 2 CK · medium
Original practice questions written by Medelix from the cited sources — not official or past exam questions (NBME, USMLE or any other board). For study purposes only; not a substitute for clinical judgment. How our questions are made.