Test your basic knowledge |

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. Starry sky pattern






2. What is the term for chronic necrotizing pulmonary infections resulting in permanent airway dilation and associated with Kartagener syndrome?






3. What bacterium is responsible for woolsorter's disease?






4. Who is responsible for passing on mitochondrial DNA genetic disorders?






5. What form of estrogen is of placental origin?






6. What cell type of the bone has PTH receptors?






7. What ocular muscle x Depresses and abducts the eyeball?






8. How many covalent bonds per purine - pyrimidine base pairing are broken during denaturation of dsDNA?






9. By What age should children be able to draw the following figures? - Square






10. What highly undifferentiated aggressive CNS tumor of primordial neuroglial origin develops in children and is associated with pseudorosettes?






11. What is the most common one? - Cancer of the esophagus in the world






12. At high doses aspirin has ________ properties.






13. What CNs are affected if there is a lesion in x The upper pons?






14. What is the most common one? - Cardiac pathology in patients with SLE






15. Name these cluster A personality disorders: x Baseline mistrust; carries grudges; afraid to open up; uses projection as defense mechanism; lacks hallucinations or delusions






16. What two compensatory mechanisms occur to reverse hypoxia at high altitudes?






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






18. What is the DOC for esophageal candidiasis?






19. What stage of male development is characterized by the following LH and testosterone levels? - LH pulsatile amplitude and levels increase - with increased testosterone production.






20. What disease that involves mental retardation - flat face - muscle hypotonia - and a double - bubble sign on radiograph poses an increased risk of Alzheimer's disease and All?






21. All AAs have titration plateaus At what pH values?






22. Up to How many hours post ejaculation do sperm retain their ability to fertilize the ovum?






23. Soap bubble appearance on radiograph






24. Is not found in smooth muscle - liver - and the kidneys.






25. What are the three branches of the celiac trunk?






26. What part of the 30S ribosome binds to the Shine - Dalgarno sequence?






27. Name the type of necrosis - Due to lipase activity and has a chalky white appearance






28. What are the three tissues where triacylglycerols are produced?






29. What CN is associated with the x Fifth pharyngeal arch?






30. Name the area of the cerebral cortex with the function described: x Speech; critical for personality - concentration - initiating and stopping tasks (do one thing and begin a new without completion of the first) - abstract thought - and memory and hi






31. What is the term for an inhibitory interneuron?






32. Name the most common type or cause - Infantile diarrhea






33. How many ATPs are produced from cytoplasmic NADH oxidation using the glycerol phosphate shuttle?






34. What is the confirmatory test for HIV?






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






36. Are salivary secretions hypertonic - hypotonic - or isotonic?






37. What level of mental retardation is characterized by x Having the ability to communicate and learn basic habits but training is usually not helpful?






38. What CNs are affected if there is a lesion in x Pontomedullary junction?






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






40. What is the most common circulation Ig in the plasma?






41. Which hepatitis B Ab indicates low transmissibility?






42. At What age does IQ stabilize?






43. What reflex increases TPR in an attempt to maintain BP during a hemorrhage?






44. What is the term for occlusion of a blood vessel due to an intravascular mass that has been carried downstream?






45. From What embryonic structure are the following structures derived? - The aortic vestibule and the conus arteriosus






46. Name the macrophages by location: x Kidney






47. What inflammatory bowel disorder is continuous - with extensive ulcerations and pseudopolyps - and is associated with HLA- B27?






48. What is the MCC of death in black males aged 15 to 24?






49. What prokaryotic positioning enzyme in translation is blocked by the following? - Erythromycin






50. What part of the ANS (i.e. - PNS or CNS) controls the constriction of the pupil in response to light?