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USMLE-Rx Step 1 Practice Q's
USMLE-Rx Step 1 Qmax Challenge #2246
151 week ago
Check out today’s Step 1 Qmax Question Challenge.
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ABO testing on a sample of B-positive blood and two unknown sample types (donor and recipient) is performed. Positive antibody-antigen interaction results in RBC agglutination. Five experiments are conducted for each sample, as shown in the image.
Which of the following pairs represents the blood types for donor and recipient?
A. A-positive donor and O-negative recipient
B. AB-positive donor and B-negative recipient
C. O-negative donor and A-positive recipient
D. B-negative donor and AB-positive recipient
E. O-positive donor and B-negative recipient
F. AB-negative donor and A-positive recipient
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USMLE-Rx Step 1 Qmax Challenge #2235
132 weeks ago
Check out today’s Step 1 Qmax Question Challenge.
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Comparing the oxygen-hemoglobin dissociation curves in the image, which of the following conditions represents curve B as compared to curve A?
A. Increased temperature
B. A higher concentration of fetal hemoglobin
C. Decreased pH
D. An elevated concentration of adult hemoglobin
E. High altitude
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Want to know the ‘bottom line?’ Purchasing a USMLE-Rx Subscription provides many more features, more questions, and passages from First Aid, including images, references, and other facts relevant to this question.
This practice question is an actual question from the USMLE-Rx Step 1 test bank. For more USMLE Step 1 prep, subscribe to our Flash Facts and Step 1 Express video series. Score the best deal on all three products with a Step 1 Triple Play Bundle.
USMLE-Rx Step 1 Qmax Challenge #2216
144 weeks ago
Check out today’s Step 1 Qmax Question Challenge.
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A 71-year-old Russian man comes to the physician complaining of a 4-month history of fatigue, low-grade fevers, night sweats, and cough. He became extremely worried yesterday when he noticed blood in his sputum. On physical examination, he is extremely thin, with enlarged, nontender left-sided cervical lymph nodes. His x-ray film of the chest is shown. The physician prescribes medication not only for the patient, but also for those who may have been in close contact with the patient.
Which of the following is an important adverse effect of the first-line medication for the prevention of this disease?
A. Aplastic anemia
B. Inhibition of bone growth in children
C. Hepatotoxicity
D. Nephrotoxicity
E. A disulfiram-like reaction with alcohol
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Want to know the ‘bottom line?’ Purchasing a USMLE-Rx Subscription provides many more features, more questions, and passages from First Aid, including images, references, and other facts relevant to this question.
This practice question is an actual question from the USMLE-Rx Step 1 test bank. For more Step 1 study help, try our Flash Facts and Step 1 Express video series.
USMLE-Rx Step 1 Qmax Challenge #2201
121 month ago
Check out today’s Step 1 Qmax Question Challenge.
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A 25-year-old man with a history of intravenous drug use presents to the physician with pain and swelling over his right upper arm. His temperature is 39.4°C (103°F), blood pressure is 90/55 mm Hg, and pulse is 100/min. Laboratory tests show a hematocrit of 44% and WBC count of 19,000/mm³. Blood cultures show numerous bacteria. CT of the leg demonstrates periosteal reaction of the fibula (see image).
Which of the following organisms is most likely causing this patient’s symptoms?
A. Salmonella species
B. Staphylococcus aureus
C. Clostridium perfringens
D. Sporothrix schenckii
E. Prevotella melaninogenica
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Want to know the ‘bottom line?’ Purchasing a USMLE-Rx Subscription provides many more features, more questions, and passages from First Aid, including images, references, and other facts relevant to this question.
This practice question is an actual question from the USMLE-Rx Step 1 test bank. For more Step 1 study help, try our Flash Facts and Step 1 Express video series.
USMLE-Rx Step 1 Qmax Challenge #2179
141 month ago
Check out today’s Step 1 Qmax Question Challenge.
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A 12-year-old girl is brought to the pediatrician because of a fever of 39.7°C (103.5°F), trouble swallowing, and drooling. Within a few minutes of arriving at the office, she develops inspiratory stridor and respiratory distress. An x-ray film of her neck is shown in the image.
Which of the following organisms is most likely responsible for this patient’s condition?
A. Gram-positive coccus growing in clusters
B. Gram-negative coccobacilli
C. Non-Gram-staining bacteria lacking a cell wall
D. Negative-sense single-stranded virus
E. Gram-positive sphere growing in chains
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Want to know the ‘bottom line?’ Purchasing a USMLE-Rx Subscription provides many more features, more questions, and passages from First Aid, including images, references, and other facts relevant to this question.
This practice question is an actual question from the USMLE-Rx Step 1 test bank. For more Step 1 study help, try our Flash Facts and Step 1 Express video series.
USMLE-Rx Step 1 Qmax Challenge #2102
111 month ago
Check out today’s Step 1 Qmax Question Challenge.
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A 27-year-old woman presents to her physician complaining of flu-like symptoms. She reports that she has been feeling fatigued with little energy for more than a month. During this time, she has had a low-grade fever and chills, and more recently she has developed a persistent cough. A sputum culture at 25°C (77°F) is shown in the image.
Which of the following is most likely to be elicited on further questioning?
A. A recent trip to New Mexico
B. Recent hiking in wooded areas
C. A recent trip to Namibia
D. Recent work in her large rose garden
E. A recent trip to Ohio
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Want to know the ‘bottom line?’ Purchasing a USMLE-Rx Subscription provides many more features, more questions, and passages from First Aid, including images, references, and other facts relevant to this question.
This practice question is an actual question from the USMLE-Rx Step 1 test bank. For more Step 1 study help, try our Flash Facts and Step 1 Express video series.
USMLE-Rx Step 1 Qmax Challenge #2076
91 month ago
Check out today’s Step 1 Qmax Question Challenge.
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A 2-year-old girl presents to the emergency room because of the acute onset of fevers to 40°C (104°F). On physical examination, she refuses to walk and does not move very much. In addition a purpuric rash is noted on her legs. Blood for cultures is drawn and empiric antibiotic treatment is begun. Twenty four hours later, a Gram stain of the culture growth is performed with the results shown in the image.
This child’s infection is associated with a deficiency of which of the following complement molecules?
A. C1 esterase
B. C2
C. C4
D. C5-C8
E. Decay accelerating factor
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Want to know the ‘bottom line?’ Purchasing a USMLE-Rx Subscription provides many more features, more questions, and passages from First Aid, including images, references, and other facts relevant to this question.
This practice question is an actual question from the USMLE-Rx Step 1 test bank. For more Step 1 study help, try our Flash Facts and Step 1 Express video series.
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