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USMLE Step 1

USMLE Step 1 Practice Tests

Sharpen your USMLE Step 1 skills with full-length practice tests, concept quizzes, and focused drills.

Practice quizzes

Biochemistry

Amino Acid Metabolism And Urea Cycle

20 practice questions

Biochemical Laboratory Techniques

20 practice questions

Citric Acid Cycle And Oxidative Phosphorylation

19 practice questions

DNA Structure, Replication, And Repair

20 practice questions

Enzymes, Kinetics, And Regulation

20 practice questions

Glycolysis, Gluconeogenesis, And Glycogen Metabolism

20 practice questions

Inborn Errors Of Metabolism

20 practice questions

Lipid Metabolism And Ketone Bodies

20 practice questions

Mitochondrial Disorders And Energy Failure

20 practice questions

Pentose Phosphate Pathway And Redox Balance

20 practice questions

Transcription, Translation, And Regulation

20 practice questions

Vitamins, Cofactors, And Nutrition

20 practice questions

Biostatistics And Epidemiology

Bias And Confounding

20 practice questions

Data Interpretation

20 practice questions

Diagnostic Test Performance

20 practice questions

Ethics And Research Principles

20 practice questions

Risk Measures And Screening

20 practice questions

Statistical Inference

20 practice questions

Statistical Tests

20 practice questions

Study Design And Evidence Types

20 practice questions

Cardiovascular System

Cardiac Pathophysiology

20 practice questions

Cardiac Physiology And Hemodynamics

20 practice questions

Vascular And Blood Pressure Disorders

20 practice questions

Endocrine System

Endocrine Pathophysiology

20 practice questions

Hormone Physiology And Regulation

20 practice questions

Metabolic And Growth Disorders

20 practice questions

Gastrointestinal System

Gastrointestinal Pathophysiology

20 practice questions

Gastrointestinal Physiology And Motility

20 practice questions

Hepatobiliary And Pancreatic Pathophysiology

20 practice questions

Genetics

Cancer Genetics

20 practice questions

Chromosomal Disorders

20 practice questions

Genetic Testing And Diagnostics

20 practice questions

Inherited Metabolic And Single-Gene Disorders

20 practice questions

Mendelian Inheritance And Pedigrees

20 practice questions

Mitochondrial And Non-Mendelian Inheritance

20 practice questions

Molecular Genetics And Gene Expression

20 practice questions

Hematology And Oncology

Cancer Biology And Neoplasia

20 practice questions

Hematologic Physiology And Disorders

20 practice questions

Immunology

Antigen Presentation And Cytokines

20 practice questions

Autoimmunity And Self-Tolerance

20 practice questions

HIV And Retroviruses

20 practice questions

Hypersensitivity Reactions

20 practice questions

Immunodeficiency Disorders

20 practice questions

Innate And Adaptive Immunity

20 practice questions

Transplantation Immunology

20 practice questions

Vaccines And Immune Memory

20 practice questions

Microbiology

Antimicrobial Mechanisms

20 practice questions

Antimicrobial Resistance

20 practice questions

Bacterial Structure, Classification, And Virulence

20 practice questions

Bacterial Toxins And Immune Evasion

20 practice questions

Fungi And Parasites

20 practice questions

Host–Pathogen Interactions

20 practice questions

Microbial Laboratory Identification

20 practice questions

Viral Structure And Replication

20 practice questions

Nervous System

Neuroanatomy And Localization

20 practice questions

Neuropathology

20 practice questions

Neurophysiology

20 practice questions

Pharmacology

Antimicrobial Pharmacology

20 practice questions

Autonomic Pharmacology

20 practice questions

Cardiovascular Pharmacology

20 practice questions

Central Nervous System Pharmacology

20 practice questions

Drug Toxicity And Adverse Effects

20 practice questions

Endocrine Pharmacology

20 practice questions

Pharmacodynamics And Receptor Theory

19 practice questions

Pharmacokinetics

20 practice questions

Toxicology And Antidotes

20 practice questions

Renal System

Acid–Base And Electrolyte Regulation

20 practice questions

Renal Pathophysiology

20 practice questions

Renal Physiology And Filtration

20 practice questions

Reproductive System

Reproductive Pathophysiology

20 practice questions

Reproductive Physiology And Development

20 practice questions

Respiratory System

Control Of Breathing And Regulation

20 practice questions

Pulmonary Pathophysiology

20 practice questions

Respiratory Physiology And Gas Exchange

20 practice questions

Practice tests

USMLE Step 1 Practice Test

100 questions · 150 minutes

Practice Test 2

Practice Test 3

Practice Test 4

Practice Test 5

Practice Test 6

Practice Test 7

Practice Test 8

Practice Test 9

Practice Test 10

Practice Test 11

Practice Test 12