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USMLE Step 1 Prep

Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. What enzyme is inhibited by disulfiram?






2. Where is the cupola of the lung in relation to the subclavian artery and vein?






3. Name the pattern of genetic transmission characterized thus: both M and F are affected; M may transmit to M; each generation has at least one affected parent; and one mutant allele may produce the disease.






4. What CN transmits sensory information from the cornea?






5. What is the longest and most convoluted segment of the nephron?






6. Can a patient refuse life - saving treatment for religious reasons?

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7. What enzyme produces an RNA primer in the 5'-3' direction and is essential to DNA replication because DNA polymerases are unable to synthesize DNA without an RNA primer?






8. What three cells are essential for T- cell maturation?






9. What aphasia produces a nonfluent pattern of speech with the abilty to understand written and spoken language seen in lesions in the dominant hemisphere?






10. Which leukotriene






11. What water - soluble - vitamin deficiency may result from eating raw eggs?






12. What is defined as a general estimate of the functional capacities of a human?






13. What scale assesses a rank order classification but does not tell the difference between the two groups?






14. Which dimorphic fungus is endemic in the Ohio - Mississippi - Missouri - and Eastern Great Lakes - is found in soil with bird and bat feces - and is associated with infections in spelunkers and chicken coop cleaners?






15. What branch off the vertebral artery supplies x The ventrolateral two - thirds of the cervical spinal cord and the ventrolateral part of the medulla?






16. Which of the following is not a risk factor for cholesterol gallstones: pregnancy - OCP use - female gender - hemolytic anemia - cirrhosis - and obesity? (May be more than one answer.)






17. What type of hemostasis in an intravascular space consists of fibrin - platelets - RBCs - and WBCs?






18. What disease is diagnosed by findings of ANAs and anti - SCL-70 antibodies?






19. What type II hypersensitivity disorder is defined as x Autoantibodies directed against the TSH receptor?






20. What organ of the body has the smallest AV oxygen difference?






21. What potentially lethal side effect of clozapine should be monitored with frequent blood drawing?






22. What embryonic structure forms the adult female structures? - Urinary bladder - urethra - greater vestibular glands - vagina






23. What enzyme is inhibited by sulfonamides?






24. Name the area of the cerebral cortex affected by the description of the effects - symptoms - and results of the lesion - Agraphia - acalculia - finger agnosia - right - left disorientation

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25. What carcinoma produces hematuria - flank pain - and a palpable mass?






26. Is CO2 a perfusion - or diffusion - limited O2 gas?






27. What enzyme of the TCA cycle catalyzes the substrate level phosphorylation?






28. What is the term for the number of Ag - binding sites on an Ig?






29. Name the lipoprotein based on the following characteristics - apo E - apo C- II - apoB-48






30. What catecholamine - hypersecreting tumor - a secondary cause of HTN - results in headache - diaphoresis - anxiety - tachycardia - and palpitations?






31. What are the four ways to down - regulate the immune system?






32. What is the most common one? - Primary malignant tumor of the ovary






33. Name the cluster C personality disorder: x Orderly - inflexible - perfectionist; makes rules - lists - order; doesn't like change - has a poor sense of humor - and needs to keep a routine






34. What cell's axons are the only ones that leave the cerebellar cortex?






35. What is the MCC of viral conjunctivitis?






36. Name the cluster B personality disorder: x In a constant state of crisis - promiscuous - unable to tolerate anxiety- causing situations - afraid of being alone - and having intense but brief relationships






37. Name the hormone






38. Where does the conversion of CO2 into HCO3- take place?






39. What is the lymphatic drainage of the pelvic organs?






40. How many attacks are needed over how much time before panic disorder is diagnosed?






41. On the venous pressure curve - What do the following waves represent? - C wave?






42. How many carbons do estrogens have?






43. What are five clinical signs of portal HTN?






44. Describe What type of fluid is either gained or lost with the following changes in body hydration for the ECF volume - ICF volume - and body osmolarity - respectively: x ECF - decrease; ICF - decrease; body: increase






45. What signals are used to direct an enzyme to a lysosome?






46. Name the antidote - Iron






47. What is the effect of hypoventilation on cerebral blood flow?






48. Name the cluster B personality disorder: x Colorful - dramatic - extroverted - seductive - and unable to hold long - term relationships






49. Name the DNA virus: x ssDNA; naked; icosahedral; replicates in the nucleus






50. What protein catalyzes the formation of the last PDE bond between the Okazaki fragments to produce a continuous strand?