Ultimate USMLE, PANCE & NP Boards
Exam Bundle 2026-2027- 200 Practice
Questions with Answers & Rationales –
Complete Medical Licensing Study Guide
1. A 24-year-old woman presents with fatigue, weight loss, heat intolerance, tremor, and
palpitations. Examination reveals a diffusely enlarged thyroid and bilateral exophthalmos.
Which antibody is most likely responsible?
A. Anti-thyroid peroxidase
B. Anti-thyroglobulin
C. Thyroid-stimulating immunoglobulin
D. Anti-dsDNA
Answer: C. Thyroid-stimulating immunoglobulin
Rationale: Graves disease is caused by antibodies that stimulate the TSH receptor, producing
hyperthyroidism and diffuse goiter. Ophthalmopathy is also characteristic.
2. A 68-year-old man develops sudden right-sided weakness and expressive aphasia. Which
cerebral artery is most likely affected?
A. Left middle cerebral artery
B. Right middle cerebral artery
C. Left posterior cerebral artery
D. Right anterior cerebral artery
Answer: A. Left middle cerebral artery
Rationale: The dominant hemisphere is usually the left hemisphere. MCA infarction can cause
contralateral face/arm weakness and aphasia.
3. Which electrolyte abnormality is most likely in a patient with persistent vomiting?
A. Hyperkalemia
B. Metabolic alkalosis with hypochloremia
,C. Metabolic acidosis with hyperchloremia
D. Hypermagnesemia
Answer: B. Metabolic alkalosis with hypochloremia
Rationale: Loss of gastric hydrochloric acid produces metabolic alkalosis and chloride depletion.
Potassium depletion may also occur.
4. A patient with type 1 diabetes presents with abdominal pain, vomiting, dehydration, and
Kussmaul respirations. Which finding is expected?
A. Low anion gap
B. Metabolic alkalosis
C. Elevated serum ketones
D. Severe hypoglycemia
Answer: C. Elevated serum ketones
Rationale: Diabetic ketoacidosis results from insulin deficiency, causing hyperglycemia,
ketogenesis, metabolic acidosis, and dehydration.
5. Which insulin is appropriate for intravenous treatment of diabetic ketoacidosis?
A. Insulin glargine
B. Regular insulin
C. NPH insulin
D. Insulin detemir
Answer: B. Regular insulin
Rationale: IV regular insulin is commonly used during DKA treatment because it has predictable
rapid activity.
6. A 55-year-old man develops crushing substernal chest pain radiating to the left arm. ECG
shows ST-segment elevation in leads II, III, and aVF. Which coronary artery is most likely
occluded?
A. Left anterior descending
B. Right coronary artery
,C. Left circumflex
D. Left main coronary artery
Answer: B. Right coronary artery
Rationale: Inferior STEMI classically involves the RCA, although the circumflex can occasionally
supply the inferior wall.
7. Which cardiac biomarker is most specific for myocardial injury?
A. Myoglobin
B. CK
C. Troponin
D. LDH
Answer: C. Troponin
Rationale: Cardiac troponins are highly sensitive and specific for myocardial injury.
8. A patient develops hypotension, muffled heart sounds, and jugular venous distention after
chest trauma. What is the likely diagnosis?
A. Tension pneumothorax
B. Cardiac tamponade
C. Pulmonary embolism
D. Aortic dissection
Answer: B. Cardiac tamponade
Rationale: Beck triad consists of hypotension, muffled heart sounds, and elevated jugular
venous pressure.
9. Which organism is the most common cause of community-acquired pneumonia?
A. Staphylococcus aureus
B. Streptococcus pneumoniae
C. Pseudomonas aeruginosa
D. Klebsiella pneumoniae
Answer: B. Streptococcus pneumoniae
, Rationale: S. pneumoniae remains a leading cause of community-acquired bacterial
pneumonia.
10. A patient with pneumonia develops rust-colored sputum. Which organism is classically
associated with this finding?
A. Streptococcus pneumoniae
B. Mycoplasma pneumoniae
C. Legionella pneumophila
D. Chlamydia pneumoniae
Answer: A. Streptococcus pneumoniae
Rationale: Pneumococcal pneumonia classically produces rusty-colored sputum.
11. A 19-year-old college student has fever, headache, neck stiffness, and photophobia. Which
CSF finding is most consistent with bacterial meningitis?
A. Lymphocytic predominance and normal glucose
B. Neutrophilic predominance and low glucose
C. Normal protein and high glucose
D. Eosinophilic predominance
Answer: B. Neutrophilic predominance and low glucose
Rationale: Bacterial meningitis typically causes neutrophilic pleocytosis, elevated protein, and
decreased CSF glucose.
12. Which organism is associated with meningitis in adolescents and young adults?
A. Neisseria meningitidis
B. Group B Streptococcus
C. Escherichia coli
D. Listeria monocytogenes
Answer: A. Neisseria meningitidis
Rationale: N. meningitidis is an important cause of meningitis in adolescents and young adults.
Exam Bundle 2026-2027- 200 Practice
Questions with Answers & Rationales –
Complete Medical Licensing Study Guide
1. A 24-year-old woman presents with fatigue, weight loss, heat intolerance, tremor, and
palpitations. Examination reveals a diffusely enlarged thyroid and bilateral exophthalmos.
Which antibody is most likely responsible?
A. Anti-thyroid peroxidase
B. Anti-thyroglobulin
C. Thyroid-stimulating immunoglobulin
D. Anti-dsDNA
Answer: C. Thyroid-stimulating immunoglobulin
Rationale: Graves disease is caused by antibodies that stimulate the TSH receptor, producing
hyperthyroidism and diffuse goiter. Ophthalmopathy is also characteristic.
2. A 68-year-old man develops sudden right-sided weakness and expressive aphasia. Which
cerebral artery is most likely affected?
A. Left middle cerebral artery
B. Right middle cerebral artery
C. Left posterior cerebral artery
D. Right anterior cerebral artery
Answer: A. Left middle cerebral artery
Rationale: The dominant hemisphere is usually the left hemisphere. MCA infarction can cause
contralateral face/arm weakness and aphasia.
3. Which electrolyte abnormality is most likely in a patient with persistent vomiting?
A. Hyperkalemia
B. Metabolic alkalosis with hypochloremia
,C. Metabolic acidosis with hyperchloremia
D. Hypermagnesemia
Answer: B. Metabolic alkalosis with hypochloremia
Rationale: Loss of gastric hydrochloric acid produces metabolic alkalosis and chloride depletion.
Potassium depletion may also occur.
4. A patient with type 1 diabetes presents with abdominal pain, vomiting, dehydration, and
Kussmaul respirations. Which finding is expected?
A. Low anion gap
B. Metabolic alkalosis
C. Elevated serum ketones
D. Severe hypoglycemia
Answer: C. Elevated serum ketones
Rationale: Diabetic ketoacidosis results from insulin deficiency, causing hyperglycemia,
ketogenesis, metabolic acidosis, and dehydration.
5. Which insulin is appropriate for intravenous treatment of diabetic ketoacidosis?
A. Insulin glargine
B. Regular insulin
C. NPH insulin
D. Insulin detemir
Answer: B. Regular insulin
Rationale: IV regular insulin is commonly used during DKA treatment because it has predictable
rapid activity.
6. A 55-year-old man develops crushing substernal chest pain radiating to the left arm. ECG
shows ST-segment elevation in leads II, III, and aVF. Which coronary artery is most likely
occluded?
A. Left anterior descending
B. Right coronary artery
,C. Left circumflex
D. Left main coronary artery
Answer: B. Right coronary artery
Rationale: Inferior STEMI classically involves the RCA, although the circumflex can occasionally
supply the inferior wall.
7. Which cardiac biomarker is most specific for myocardial injury?
A. Myoglobin
B. CK
C. Troponin
D. LDH
Answer: C. Troponin
Rationale: Cardiac troponins are highly sensitive and specific for myocardial injury.
8. A patient develops hypotension, muffled heart sounds, and jugular venous distention after
chest trauma. What is the likely diagnosis?
A. Tension pneumothorax
B. Cardiac tamponade
C. Pulmonary embolism
D. Aortic dissection
Answer: B. Cardiac tamponade
Rationale: Beck triad consists of hypotension, muffled heart sounds, and elevated jugular
venous pressure.
9. Which organism is the most common cause of community-acquired pneumonia?
A. Staphylococcus aureus
B. Streptococcus pneumoniae
C. Pseudomonas aeruginosa
D. Klebsiella pneumoniae
Answer: B. Streptococcus pneumoniae
, Rationale: S. pneumoniae remains a leading cause of community-acquired bacterial
pneumonia.
10. A patient with pneumonia develops rust-colored sputum. Which organism is classically
associated with this finding?
A. Streptococcus pneumoniae
B. Mycoplasma pneumoniae
C. Legionella pneumophila
D. Chlamydia pneumoniae
Answer: A. Streptococcus pneumoniae
Rationale: Pneumococcal pneumonia classically produces rusty-colored sputum.
11. A 19-year-old college student has fever, headache, neck stiffness, and photophobia. Which
CSF finding is most consistent with bacterial meningitis?
A. Lymphocytic predominance and normal glucose
B. Neutrophilic predominance and low glucose
C. Normal protein and high glucose
D. Eosinophilic predominance
Answer: B. Neutrophilic predominance and low glucose
Rationale: Bacterial meningitis typically causes neutrophilic pleocytosis, elevated protein, and
decreased CSF glucose.
12. Which organism is associated with meningitis in adolescents and young adults?
A. Neisseria meningitidis
B. Group B Streptococcus
C. Escherichia coli
D. Listeria monocytogenes
Answer: A. Neisseria meningitidis
Rationale: N. meningitidis is an important cause of meningitis in adolescents and young adults.
