Vitamins and Nutrition USMLE Step 1 Practice Questions
22 board-style USMLE Step 1 questions in Biochemistry. Each question shows the correct answer; create a free account for the full explanation and adaptive practice.
- USMLE Step 1 · easy1. A 15-year-old girl with restrictive eating habits presents with sore throat, angular cheilitis, and a greasy scaling rash over the nasolabial folds. Vital signs show BP 98/62, H…
- USMLE Step 1 · medium2. A 41-year-old man on isoniazid and rifampin for pulmonary tuberculosis presents with irritability, progressive numbness in his hands, and new-onset generalized seizures. Vital s…
- USMLE Step 1 · easy3. A 2-day-old boy delivered at home without routine newborn prophylaxis presents with oozing from the umbilical stump and melena. Vital signs show HR 145 bpm, RR 48/min, BP 58/38…
- USMLE Step 1 · medium4. A 45 year old woman has chronic watery diarrhea, episodic flushing, and a 6 month history of worsening confusion and hyperpigmented scaling on sun exposed areas of her hands and…
- USMLE Step 1 · easy5. A 58 year old man with alcohol use disorder is brought to the hospital because of confusion and difficulty walking. On examination, he has horizontal nystagmus, impaired abducti…
- USMLE Step 1 · medium6. A 6-year-old boy with cystic fibrosis presents with difficulty seeing in dim light and night blindness over the past 2 months. Vital signs: BP 95/60, HR 98, RR 22, Temp 37°C, Sp…
- USMLE Step 1 · hard7. A 9-year-old boy presents with progressive gait instability and decreased vibratory sensation in lower extremities. He has chronic steatorrhea and failure to thrive. Vital signs…
- USMLE Step 1 · medium8. A 4-month-old infant with exclusive bottle feeding presents with chronic diarrhea, poor weight gain, and alopecia. Physical examination reveals crusted erythematous dermatitis p…
- USMLE Step 1 · medium9. A 28 year old woman presents with diffuse hair loss, scaly dermatitis around the eyes and mouth, and depressed mood. She has been consuming large amounts of raw egg whites as pa…
- USMLE Step 1 · medium10. A 62 year old woman presents with progressive numbness in her feet and difficulty with balance. She underwent ileal resection several years ago for Crohn disease. Laboratory stu…
- USMLE Step 1 · easy11. A 72 year old man who lives alone presents with fatigue, gum bleeding, and easy bruising. Examination shows swollen bleeding gums, perifollicular hemorrhages, and corkscrew hair…
- USMLE Step 1 · easy12. A 48-year-old man with severe alcohol use disorder and chronic malnutrition presents with a 3-month history of chronic diarrhea, irritability, and disorientation. Vital signs sh…
- USMLE Step 1 · medium13. A 54 year old man with alcohol use disorder is brought to the emergency department for confusion and difficulty walking. Examination reveals horizontal nystagmus, ophthalmoplegi…
- USMLE Step 1 · medium14. An 83-year-old male is brought to the physician because of diarrhea and vomiting for the past month. He is unable to give a clear history, but his daughter reports that he has b…
- USMLE Step 1 · medium15. A 57-year-old alcohol-dependent male presents to the emergency department with acute global confusion, psychosis, and ataxia. Vital signs show BP 128/82 mmHg, HR 102/min, RR 18/…
- USMLE Step 1 · medium16. A cardiovascular researcher is conducting a study to evaluate the relationship between folate levels and cardiovascular disease. The results of the study show that persons with…
- USMLE Step 1 · medium17. A 40-year-old, formerly obese female presents to her physician. She was very proud of having lost 80 lb during the previous 2 years, but has now noticed that her 'hair is fallin…
- USMLE Step 1 · medium18. A 50-year-old male with a 20-year history of alcohol use disorder presents with confusion, ophthalmoplegia affecting lateral gaze, and ataxia. Vital signs show BP 128/76 mmHg, H…
- USMLE Step 1 · medium19. A 69-year-old edentulous, alcohol-dependent man who lives alone is admitted to the hospital for evaluation of a shoulder wound that is not healing well. On physical examination,…
- USMLE Step 1 · medium20. A 30-year-old vegetarian male presents with progressive paresthesias in his lower extremities and gait disturbance over 6 months. He has followed a strict meat-free diet for 15…
- USMLE Step 1 · medium21. A 26-year-old pregnant female presents with persistent, dry, ulcerated skin over her knees and elbows for 8 weeks. Vital signs: BP 118/76, HR 88, RR 16, Temp 37°C, SpO2 98%. Exa…
- USMLE Step 1 · medium22. A 23-year-old, single, unemployed female in her eighth month of pregnancy is seen in a volunteer-staffed obstetrics clinic. Her first child, born at home and exclusively breast-…