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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. Name the RNA subtype based on the following: x RNA molecules with enzymatic activity






2. Name the DNA virus: x Circular dsDNA; naked; icosahedral; replicates in the nucleus






3. What three major cell lines participate in the acquired immune system?






4. What cell converts androgens to estrogens?






5. What is the most common site for implantation of the blastocyst?






6. Name the muscle type based on the histological features: x Actin and myosin in sarcomeres; striated; uninuclear; gap junctions; troponin:calcium binding complex; T tubules and SR forming dyadic contacts; voltage - gated calcium channels






7. Induces the cytochrome P-450 enzymes.






8. Codman triangle on radiograph






9. What are the four functions of SER?






10. Name the aphasia based on these characteristics: x Lesion is in the parietal lobe or arcuate fibers because the connection between Broca's and Wernicke's area is severed; word comprehension preserved; inability to write or speak the statement (can't






11. How are pulse pressure and compliance related?






12. What is the drug of choice for treating ADHD?






13. What is the only muscle of the soft palate that is innervated by CN V3?






14. What is a plasma cell's life expectancy?






15. Increases the risk of developing ovarian cancer.






16. What is the most common one? - Site of ischemia in the GI tract






17. Megaloblastic anemia and thrombocytopenia are signs of what vitamin deficiency?






18. What agent is used IM to treat acute dystonias?






19. What scale has a true zero point - graded into equal increments - and also orders them?






20. What form of nephritic syndrome is associated with celiac sprue and Henoch - Sch






21. Which encapsulated fungus is found in soil enriched with pigeon droppings?






22. What is the term for making up stories regarding past experiences because of an inability to retrieve them?

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23. What three AAs are used to synthesize the purine ring?






24. Which leukotriene is chemotactic for neutrophils?






25. What enzyme of heme synthesis is deficient in the autosomal dominant disorder acute intermittent porphyria?






26. What is the titratable acid form of H+ in the urine?






27. What is the binding site for RNA polymerase?






28. What class of drugs is used in the treatment of demineralization of the bone?






29. What IV- only agent inhibits water reabsorption in the PCTs and is used to treat increased intracranial pressure - increased intraocular pressure - and acute renal failure?






30. Name the phase of the ventricular muscle action potential based on the following information: x Slow channels open - allowing calcium influx; voltage - gated potassium channels closed; potassium efflux through ungated channels; plateau stage






31. Name the compartment of the mediastinum associated with the following thoracic structures: Trachea






32. What is the term for the same results achieved again on testing a subject a second or third time?






33. What happens to the following during skeletal muscle contraction? - I band






34. All Proteus species are...






35. What GI pathology is associated with a positive string sign - an increase in the number of bloody stools - RLQ pain - skip lesions - terminal ileum most commonly affected - occurrence in women more than men - and an increased thickness of the bowel?






36. Increases the effect of digoxin.






37. What form of arthritis is associated with calcium pyrophosphate crystals?






38. What is the most common primary diagnosis resulting in an office visit for males? For females?






39. What is the most common one? - Site of Crohn disease






40. What cell type of the epidermis functions as antigen - presenting cells?






41. What enzyme is deficient in selective T cell immunodeficiency?






42. What genetic defect is characterized by coarse facial features - gingival hyperplasia - macroglossia - psychomotor and growth retardation - club foot - claw hand - cardiorespiratory failure - and death in the first decade of life?






43. Name the cancer associated with the following oncogenes. (Some may have more than one answer) x Ki - ras and erb -2






44. What two viruses are associated with Reye's syndrome?






45. What drug is given transdermally for chronic pain but can cause chest wall rigidity if given IV?






46. From which two substances are phospholipids made?






47. Both submandibular and sublingual glands are innervated by CN VII (facial) and produce mucous and serous secretions. Which one mainly produces serous secretions?






48. Which CNs are found in the midline of the brainstem?






49. What tumor constitutes 40% of testicular tumors in children?






50. What is the term for gastric ulcers associated with increased intracranial pressure?

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