COMLEX LEVEL 1 HIGH-YIELD QUESTIONS AND ANSWERS –
QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED
ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST
EXAM UPDATE
CORE DOMAINS*
- Anatomy
- Physiology
- Biochemistry
- Microbiology
- Pathology
- Pharmacology
- Osteopathic Principles and Practice (OPP/OMM)
- Behavioral Science and Ethics
- Immunology
- Clinical Decision-Making
, INTRODUCTION*
This assessment is designed to evaluate the foundational and applied
medical knowledge required for success on COMLEX Level 1. The
examination emphasizes integration of basic sciences with clinical
reasoning, osteopathic principles, and patient-centered decision-
making. Questions include both traditional multiple-choice items and
scenario-based clinical vignettes that reflect real-world medical
practice. Candidates are expected to demonstrate competence in
anatomy, physiology, pathology, pharmacology, microbiology, ethics,
and osteopathic manipulative medicine. The assessment focuses on
interpretation, analysis, and application of knowledge rather than
simple memorization, ensuring readiness for clinical training and
professional responsibilities.
SECTION ONE (QUESTIONS 1–50)
1. Which enzyme converts angiotensin I to angiotensin II?
A. Renin
B. Angiotensin-converting enzyme
C. Aldosterone synthase
D. Bradykinin kinase
,🟢 Correct Answer: B. Angiotensin-converting enzyme
🔴 Explanation: ACE converts angiotensin I into angiotensin II, a
potent vasoconstrictor.
2. A patient presents with hyperglycemia and destruction of
pancreatic beta cells. What is the most likely diagnosis?
A. Type 1 diabetes mellitus
B. Type 2 diabetes mellitus
C. Cushing syndrome
D. Acromegaly
🟢 Correct Answer: A. Type 1 diabetes mellitus
🔴 Explanation: Autoimmune destruction of beta cells causes
absolute insulin deficiency.
3. Which cranial nerve carries parasympathetic fibers to most
thoracic and abdominal organs?
A. CN III
B. CN VII
C. CN IX
D. CN X
, 🟢 Correct Answer: D. CN X
🔴 Explanation: The vagus nerve provides parasympathetic
innervation to major visceral organs.
4. The primary neurotransmitter released at the neuromuscular
junction is:
A. Dopamine
B. Acetylcholine
C. Norepinephrine
D. Serotonin
🟢 Correct Answer: B. Acetylcholine
🔴 Explanation: Skeletal muscle contraction is initiated by
acetylcholine release.
5. Which vitamin deficiency causes megaloblastic anemia and
neurologic deficits?
A. Vitamin C
B. Vitamin K
C. Vitamin B12
D. Vitamin D
QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED
ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST
EXAM UPDATE
CORE DOMAINS*
- Anatomy
- Physiology
- Biochemistry
- Microbiology
- Pathology
- Pharmacology
- Osteopathic Principles and Practice (OPP/OMM)
- Behavioral Science and Ethics
- Immunology
- Clinical Decision-Making
, INTRODUCTION*
This assessment is designed to evaluate the foundational and applied
medical knowledge required for success on COMLEX Level 1. The
examination emphasizes integration of basic sciences with clinical
reasoning, osteopathic principles, and patient-centered decision-
making. Questions include both traditional multiple-choice items and
scenario-based clinical vignettes that reflect real-world medical
practice. Candidates are expected to demonstrate competence in
anatomy, physiology, pathology, pharmacology, microbiology, ethics,
and osteopathic manipulative medicine. The assessment focuses on
interpretation, analysis, and application of knowledge rather than
simple memorization, ensuring readiness for clinical training and
professional responsibilities.
SECTION ONE (QUESTIONS 1–50)
1. Which enzyme converts angiotensin I to angiotensin II?
A. Renin
B. Angiotensin-converting enzyme
C. Aldosterone synthase
D. Bradykinin kinase
,🟢 Correct Answer: B. Angiotensin-converting enzyme
🔴 Explanation: ACE converts angiotensin I into angiotensin II, a
potent vasoconstrictor.
2. A patient presents with hyperglycemia and destruction of
pancreatic beta cells. What is the most likely diagnosis?
A. Type 1 diabetes mellitus
B. Type 2 diabetes mellitus
C. Cushing syndrome
D. Acromegaly
🟢 Correct Answer: A. Type 1 diabetes mellitus
🔴 Explanation: Autoimmune destruction of beta cells causes
absolute insulin deficiency.
3. Which cranial nerve carries parasympathetic fibers to most
thoracic and abdominal organs?
A. CN III
B. CN VII
C. CN IX
D. CN X
, 🟢 Correct Answer: D. CN X
🔴 Explanation: The vagus nerve provides parasympathetic
innervation to major visceral organs.
4. The primary neurotransmitter released at the neuromuscular
junction is:
A. Dopamine
B. Acetylcholine
C. Norepinephrine
D. Serotonin
🟢 Correct Answer: B. Acetylcholine
🔴 Explanation: Skeletal muscle contraction is initiated by
acetylcholine release.
5. Which vitamin deficiency causes megaloblastic anemia and
neurologic deficits?
A. Vitamin C
B. Vitamin K
C. Vitamin B12
D. Vitamin D
