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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 DNA virus is associated with heterophile - negative mononucleosis?






2. Which trophoblast layer of the placenta remains until the end of pregnancy?






3. What is the maximum rate possible with a given amount of enzyme?






4. What is the only way to increase the Vmax of a reaction?






5. Has analgesic and antipyretic activities but lacks anti - inflammatory effects.






6. What is the most common one? - Type of melanoma






7. What eukaryotic translation enzyme is associated with the following: x Initiation






8. What hormone - stimulated by epinephrine - results in an increase in lipolysis?






9. What are the four signs of acute inflammation?






10. What enzyme of the TCA cycle also acts as complex II of the ETC?






11. What is the most common one? - Tumor in individuals exposed to asbestos






12. What is the term for a substance secreted by a leukocyte in response to a stimulus?






13. What form of anxiety - appearing at 6 months - peaking at 8 months - and disappearing by 1 year of age - is seen in the presence of unfamiliar people?






14. Name the associated chromosome - Down syndrome






15. What transports iron in the blood?






16. Name the three hormones produced by pinealocytes.






17. Which prophylactic asthmatic agent is an antagonist of LTD4?






18. Are necessary for normal menstrual cycles.






19. What is the term for neurologic signs consistent with a cerebrovascular accident but lasting 24 hours with full recovery?






20. What is the term for an inhibitory interneuron?






21. Name the T- cell CD marker: x Essential for Ab isotype switching (for B cell binding)






22. What condition results in the following CSF results? - Opening pressure 70 to 180 mm H2O; 0-10 WBCs (monocytes); glucose 45 to 85 - protein 15 to 45






23. What thalamic relay nucleus do the mammillary bodies project to?






24. What are the longest - acting and shortest - acting benzodiazepines?






25. What is the term for white retinal spots surrounded by hemorrhage? In what condition are they seen?






26. What disorder is described as having x Unconscious symptoms with unconscious motivation?






27. Which major cell type is found in the red pulp of the spleen?






28. Name the type of necrosis - Seen as dead tissue with liquefactive necrosis?






29. What is the term for normal cellular genes associated with growth and differentiation?






30. What embryonic structure forms the following adult structures? - Nephrons - kidney






31. What is the primary target for the action of glucagon?






32. What is the most common opportunistic infection of the CNS in HIV?






33. What AA undergoes N- glycosylation?






34. What aneurysm of the circle of Willis is associated with polycystic kidney disease?






35. What vasculitis is characterized by systemic vasculitis in small to medium - size vessels (except the lung); affecting young males; 30% HBsAg - positive; P- ANCA and autoantibodies against myeloperoxidase?






36. If you order a V/Q scan for suspected pulmonary emboli - is the filling defect seen on the ventilation or perfusion side?






37. What operant conditioning therapy or modification is described as x Removing a reinforcement (without the patient knowing) gradually over time to stop a condition?






38. What antiviral agent is used in the treatment of drug - induced Parkinson's disease?






39. What is the FiO2 of room air?






40. What receptor is in the smooth muscle cells of the small bronchi - is stimulated during inflation - and inhibits inspiration?






41. To What is the diffusion rate indirectly proportional?






42. What bone disorder is characterized by brown tumors - bone pain - deformities - and fractures due to excessive PTH?






43. What cells of the epidermis carry the pigment melanin?






44. What glycoprotein allows platelets to adhere to each other through the use of fibrinogen?






45. What nerve is associated with the following functions? - Supinate the wrist - extend the wrist and digits - extend the shoulder and elbow






46. Name the type of regeneration (i.e. - labile - stable - or permanent) based on the following examples - Smooth muscle






47. Which acid - fast rod is an obligate intracellular parasite?






48. How does myelination affect conduction velocity of an action potential?






49. What is the most common one? - Location of a gastric ulcer






50. Name the aphasia based on these characteristics: x Nonfluent speech - telegraphic and ungrammatical; lesion in Brodmann's area 44; unimpaired comprehension

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Can you answer 50 questions in 15 minutes?



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