USMLE-Rx Step 1 Practice Q's

USMLE-Rx Step 1 Qmax Challenge #3972

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USMLE-Rx Step 1 Qmax Challenge #3972A 2-year-old child has no red reflex in the right eye. He is subsequently found to have an eye tumor, as shown in the image, that is caused by dysfunction of a specific cell-cycle regulatory gene product.

What is the normal function of this gene product in a quiescent cell?

A. Prevents cell-cycle progression past the G1/S checkpoint
B. Prevents cell-cycle progression past the G2/M checkpint
C. Promotes DNA damage repair
D. Promotes histone acetylation
E. Regulates apoptosis and angiogenesis

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USMLE-Rx Step 1 Qmax Challenge #3966

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USMLE-Rx Step 1 Qmax Challenge #3966A 50-year-old Chinese immigrant presents to his primary care physician complaining of fever, night sweats, and blood-tinged sputum for the past 3 weeks. An x-ray of the chest, shown in the image, is remarkable for opacity in the right upper lobe.

Which of the following adverse effects is commonly associated with a drug used in the treatment of this man’s disease?

A. Blue and yellow color blindness
B. Myalgias
C. Numbness and tingling
D. Ophthalmoplegia
E. Renal failure

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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 #3962

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USMLE-Rx Step 1 Qmax Challenge #3962The image shows one anatomic variation that can occur from abnormal development of this paired, embryonic, mesodermally derived organ.

In the presence of Müllerian inhibiting factor, the embryonic organ giving rise to the structure shown in the drawing will develop into which of the following?

A. Appendix epididymis
B. Appendix testes
C. Bulbourethral glands
D. Paradidymis
E. Skene’s glands

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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 #3952

9

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USMLE-Rx Step 1 Qmax Challenge #3952A man is brought to the emergency department following a bar fight and is treated for a deep laceration on his left cheek. On physical examination, there is no jaw deviation. He is able to blink, close his eyes tightly, wrinkle his forehead, and move his tongue symmetrically. Sensation throughout the face is intact. However, on closer inspection, the left corner of his mouth droops.

Using the image as a guide, through which of the following cranial structures does the damaged nerve pass?

A. Foramen magnum
B. Foramen ovale
C. Hypoglossal canal
D. Jugular foramen
E. Stylomastoid foramen

———————–

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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 #3911

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USMLE-Rx Step 1 Qmax Challenge #3911A full-term baby is born to a 26-year-old woman who did not seek medical care during her pregnancy. The baby does well initially, but develops red eyes with purulent discharge on day 13. The responsible organism from a special cell culture is is shown in the image.

The infectious agent most likely responsible for this baby’s condition is also involved in the pathogenesis of which neonatal disease?

A. Cervicitis
B. Meningitis
C. Pelvic inflammatory disease
D. Pneumonia
E. Urethritis
F. Waterhouse-Friderichsen syndrome

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USMLE-Rx Step 1 Qmax Challenge #3905

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USMLE-Rx Step 1 Qmax Challenge #3905A previously healthy 41-year-old man misses several days of work as a result of a viral illness with symptoms including fever, headache, and fatigue. He also experiences a nonproductive cough and a sore throat. By the third day, his symptoms begin to subside and he is able to return to work. The next week, however, he experiences a rapid relapse. His cough returns, but now it is a productive cough with mucopurulent sputum. He also begins to experience pleuritic chest pain. On visiting a physician, x-ray of the chest is ordered and is shown in the image.

Which of the following describes the structure of the viral genome that most likely caused his initial illness?

A. Enveloped, double-stranded DNA
B. Enveloped, nonsegmented, single-stranded RNA
C. Enveloped, segmented, single-stranded RNA
D. Non-enveloped, nonsegmented, double-stranded RNA
E. Non-enveloped, nonsegmented, single-stranded RNA

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USMLE-Rx Step 1 Qmax Challenge #3902

7

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USMLE-Rx Step 1 Qmax Challenge #3902A 32-year-old janitor presents with a disease of infectious origin. The organism responsible for his symptoms is revealed with an India ink stain, shown in the image.

What clinical findings would be most likely in this patient?

A. Diffuse abdominal pain with rebound tenderness
B. Dull bone pain that worsens on movement
C. Fever, fatigue, cough, and pleuritic chest pain
D. Ulcerative cutaneous papules
E. Urinary frequency and urgency

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Want to know the ‘bottom line?’ Purchase a USMLE-Rx Subscription and get 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.

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