NBCE Part I Practice Test 2026 — Free NBCE Part I Exam Prep Questions
NBCE Part I is the basic-science board exam that chiropractic students usually take in their second year. It covers general anatomy, spinal anatomy, physiology, chemistry, pathology and microbiology. Our original questions follow the current six-domain Part I test plan and explain why each option is right or wrong.
A farmer develops jaw stiffness, risus sardonicus and painful generalized muscle spasms 10 days after a puncture wound. The responsible toxin produces these signs mainly by which action?
NBCE Part I format, scoring & key facts
Computer-based at Prometric test centers and on some chiropractic college campuses.
Facts last verified Oct 4, 2026. Source: www.mynbce.org/part-i-test-plan/. Always confirm details with NBCE before your exam.
When can you take the NBCE Part I?
Plan backwards from your exam date
What the NBCE Part I covers
Every PrepBanq NBCE Part I test mirrors the official domain weights.
Domain distribution
% of the exam| Content domain | Weight | ≈ Questions on exam | Our practice questions |
|---|---|---|---|
General AnatomyTopographical anatomy, the appendicular skeleton (bones, joints, muscles) and the cardiovascular, digestive, respiratory, urogenital and endocrine systems. | 20% | ~51 | 5 questions → |
Spinal AnatomyAxial skeleton osteology, myology and arthrology, the central, peripheral and autonomic nervous systems, and the special senses. | 22% | ~56 | 6 questions → |
PhysiologyNeuro, muscle, cardiovascular, respiratory, renal, gastrointestinal, reproductive, endocrine and exercise physiology. | 18% | ~46 | 4 questions → |
ChemistryBiochemistry of carbohydrates, lipids, proteins, enzymes, hormones, nucleotides, vitamins, minerals and energy metabolism. | 13% | ~33 | 3 questions → |
PathologyGeneral pathology, genetic and immune disorders, environmental and nutritional disease, and musculoskeletal, nervous and organ-system pathology. | 16% | ~41 | 4 questions → |
MicrobiologyImmunology, bacteria, viruses and prions, fungi, parasites, and epidemiology and disease control. | 11% | ~28 | 3 questions → |
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NBCE Part I FAQ
How many questions are on the NBCE Part I?
The NBCE Part I has 255 questions and you have 3 hours 26 minutes to finish. Question types: Multiple choice, grouped by domain, forward-only navigation.
How long is the NBCE Part I exam?
Testing time for the NBCE Part I is 3 hours 26 minutes.
What is the passing score for the NBCE Part I?
NBCE Part I passing standard: 375 (compensatory scoring across all six domains).
What is on the NBCE Part I?
The NBCE Part I covers General Anatomy (about 20%), Spinal Anatomy (about 22%), Physiology (about 18%), Chemistry (about 13%), Pathology (about 16%), Microbiology (about 11%).
Who administers the NBCE Part I?
The NBCE Part I — Basic Sciences is administered by NBCE. Delivery: Computer-based at Prometric test centers and on some chiropractic college campuses.
Is there a free NBCE Part I practice test?
Yes. PrepBanq has 3 free NBCE Part I practice tests with 25 exam-style questions in the real NBCE Part I formats, and every answer is explained. No credit card is needed.
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