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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. Which IV agent has the lowest incidence of postoperative emesis and has the fastest rate of recovery?






2. Name these narcissistic defense mechanisms: x Everything in the world is perceived as either good or bad . No middle ground; it is all extremes.






3. What is the term for different classes and subclasses of the same gene products?






4. What AA is a precursor of the following substances? - Histamine






5. Which hepatitis strain is a defective virus that can replicate only inside HBV- infected cells?






6. What are the three C's of a TCAD overdose?






7. Name the cancer associated with the following tumor markers. (Some may have more than one answer.) x CA-19.9 and CEA






8. What is the most common serotype of enterohemorrhagic Escherichia coli?






9. Name the lung measurement based on the following descriptions: x The maximal volume inspired from FRC






10. What reflex - seen in lesions of the corticospinal tract - is an extension of the great toe with fanning the of remaining toes?






11. In prokaryotes - What is the term for a set of structural genes that code for a select group of proteins and the regulatory elements required for the expression of such gene?






12. What enzyme is deficient in the following glycogen storage disease? - McArdle's disease






13. What agent antagonizes the effects of heparin?






14. What type of cell surface projection lies on the lateral surface of cells closest to the apex and acts to seal off the outside environment from the rest of the body?






15. 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






16. Name the antimicrobial agent whose major side effect is listed - Grey baby syndrome






17. Is Dubin - Johnson or Rotor syndrome associated with black pigmentation of the liver?






18. What P value defines whether the hull hypothesis should or should not be rejected?






19. What size ribosomes do fungi have?






20. Which benzodiazepine has the longest half - life?






21. What are the primary neurotransmitters at the following sites? - Postganglionic sympathetic neurons






22. What has occurred to the renal arterioles based on the following changes in the GFR - RPF - FF - and glomerular capillary pressure? - GFR ? - RPF ? - FF ? - capillary pressure ?






23. What excitatory fibers arise from the inferior olivary nuclei on the contralateral side of the body?






24. What is the primary predisposing factor for vascular dementia?






25. What lower extremity nerve is described by the following motor loss? - Loss of flexion of the knee and all function below the knee - weakened extension of the thigh






26. Are hydrolysis - oxidation - and reduction phase I or II biotransformations?






27. Name the B- cell CD marker: x Required for class switching signals from T cells






28. Name the structure that enters or exits the following foramina: x Cribriform plate






29. The DSM- IV- TR is scored on the basis of five axes of diagnosis. In What axis would you place x Medical or physical ailments?






30. What is the most common one? - Renal cell cancer type






31. What three bacteria are positive to quellung reactive test?






32. Which carcinoma






33. What component of the basement membrane binds to collagen type IV and heparin sulfate and is a cell surface receptor?






34. What virus is associated with progressive multifocal leukoencephalopathy?






35. What spirochete is responsible for Lyme disease?






36. Name the period described by the following statement: no matter how strong a stimulus is - no further action potentials can be stimulated.






37. What phase of the cell cycle are the following antineoplastic agents specific for? - Paclitaxel






38. Which muscarinic receptor uses a decrease in adenyl cyclase as its second messenger?






39. What judgment states that the decision - by rights of autonomy and privacy - belongs to the patient - but if the patient is incompetent to decide - the medical decision is based on subjective wishes?






40. If inserting a needle to perform a pleural tap or insertion of a chest tube - do you use the inferior or the superior border of a rib as your landmark? Why?






41. What blood disorder is a side effect of metformin?






42. What AA undergoes N- glycosylation?






43. Name these anxiety defense mechanisms: x Use of explanations to justify unacceptable behaviors.






44. What two CNs are responsible for the carotid body and sinus reflexes?






45. What is the rate - limiting step in the synthetic pathway of NE at the adrenergic nerve terminal?






46. Neurons in the dorsal horn participate in...






47. What gland is found in the muscular triangle of the neck?






48. Name the most common type or cause - Chancre






49. Name the RNA subtype based on the following: x The most abundant form of RNA in the cell






50. What is the rate - limiting step of the following? - Fatty acid synthesis







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