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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 is the primer for the synthesis of the second strand in production of cDNA from mRNA?

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2. Eating fava beans can produce the Mediterranean type of what deficiency?






3. What two substances stimulate Sertoli cells?






4. Is the Lac operon activated or inactivated in the presence of both glucose and lactose?






5. What are two causes of diffusion impairment in the lungs?






6. Name these anxiety defense mechanisms: x Separating oneself from the experience. The facts are accepted but the form is changed for protection.






7. What pineal hormone's release is inhibited by daylight and increased dramatically during sleep?






8. Name the hypochromic microcytic anemia based on the following laboratory values - Normal iron - TIBC - percent saturation - and ferritin






9. What gluconeogenic mitochondrial enzyme requires biotin?






10. Patients with ___________ have no Barr bodies.






11. What form of anemia is diagnosed with sucrose lysis test and Ham test?






12. Name the compartment of the mediastinum associated with the following thoracic structures: Thoracic duct






13. Name the DNA virus: x Linear dsDNA; naked; replicates in the nucleus






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






15. What protective covering adheres to the spinal cord and CNS tissue?






16. What is the most common one? - Vasculitis






17. In prokaryotes - What is the name of the RNA sequence that ribosomes bind to so translation can occur?






18. What is the drug of choice for threadworm - trichinosis - and larva migrans?






19. Name the hepatitis virus based on the following information - Enveloped DNA hepadnavirus






20. What encapsulated lymphoid organ is characterized by presence of Hassall's corpuscles - and absence of germinal centers and B cells?






21. What is the term for a RBC that has a peripheral rim of Hgb with a dark central Hgb - containing area?






22. What type of GN occurs most commonly in children after a pharyngeal or skin infection; is immune complex- mediated; and is seen as lumpy- bumpy subepithelial deposits?






23. What is the major inorganic component of bone?






24. What vascular injury may result from a supracondylar fracture of the femur?






25. What is the most common one? - Malignant carcinoma of the ovaries






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






27. What thyroid carcinoma secretes calcitonin and arises from the parafollicular C cells?






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






29. What is the most common one? - Esophageal carcinoma






30. What is the major hormone produced in the following areas of the adrenal cortex? - Zona reticularis






31. Which centrally acting a2- adrenergic agonist is used in the treatment protocol of opioid withdrawal?






32. Name the nephritic disease based on the immunofluorescent staining - Mesangial deposits of IgA and C3






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






34. Fact without feeling (la belle indiff






35. A complete opposite expression of your inward feeling (e.g. - arguing all the time with someone you are attracted to when your feelings are not known)






36. In what stage of sleep is it easiest to arouse a sleeping individual?






37. What ganglion receives preganglionic sympathetic fibers from T1 to L1-2 and innervates smooth muscle - cardiac muscle - glands - head - thoracic viscera - and blood vessels of the body wall and limbs?






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






39. What is the only Plasmodium that is quartan?






40. What enzyme of the purine salvage pathway is deficient in the following? - Selective T- cell immunodeficiency






41. Which thalamic nucleus receives auditory input from the inferior colliculus?






42. What parasite is associated with squamous cell carcinoma of the urinary bladder?






43. Which calcium channel blocker is used to treat subarachnoid hemorrhages by preventing posthemorrhagic vasospasms?






44. By removing Na+ from the renal tubule and pumping it back into the ECF compartment - What does aldosterone do to the body's acid - base stores?






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






46. Name the macrophages by location: x Lungs






47. What branch off the vertebral artery supplies x The cerebellum and the dorsolateral part of the medulla?






48. Where are the postganglionic neuron cell bodies - the CNS or the PNS?






49. Why is O2 content depressed in anemic patients?






50. What term is an index of the effort needed to expand the lungs (i.e. - overcomes recoil)?