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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 a2- antagonist is used to treat impotence and postural hypotension?






2. What gram - positive rod is distinguished by its tumbling motility?






3. What is the DOC for CMV retinitis?






4. Where are the tonsillar tissues?

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5. What are the three effects of insulin on protein metabolism?






6. What enzyme does HIV use to integrate the proviral dsDNA into the host?






7. Which hepatitis B serology markers






8. What muscles in the hand adduct the fingers?






9. What disease is a cavitation of the spinal cord causing bilateral loss of pain and temperature at the level of the lesion?






10. What enzyme catalyzes the rate - limiting step in fatty acid oxidation?






11. What condition results from a 46XX karyotype and female internal organs with virilized external genitalia?






12. Name the primary vesicle the following structures are derived from (proencephalon - mesencephalon - or rhombencephalon) - Metencephalon






13. What three chemical agents are associated with angiosarcomas of the liver?






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






15. What virus is associated with both nasopharyngeal carcinoma and Burkitt lymphoma?






16. What is the only CN nucleus found in the cervical spinal cord?






17. What artery travels with the following veins? - Small cardiac vein






18. What ovarian carcinoma is characterized by psammoma bodies?






19. Name the three enzymes that protect the cell from oxygen - derived free radicals.






20. What is the most common one? - Malignant tumor of the esophagus






21. What is the most common one? - Complication of PDA






22. What water - soluble - vitamin deficiency is associated with cheilosis and magenta tongue?






23. Name the aphasia based on these characteristics: x Lesion in Brodmann area 22; impaired comprehension; incoherent rapid - fluent speech; verbal paraphrasias; trouble repeating statements

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24. What are the two reasons for megaloblastic anemia with elevated MCV?






25. Name the cluster C personality disorder: x Orderly - inflexible - perfectionist; makes rules - lists - order; doesn't like change - has a poor sense of humor - and needs to keep a routine






26. What embryonic structure forms the adult male structure? - Corpus cavernosus - corpus spongiosum - and glans and body of the penis






27. What embryonic structure forms the adult female structures? - Ovary - follicles - rete ovarii






28. What diseases are associated with the HLA- B27 allele

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29. If you double the infusion rate of a drug - how long will it take to reach steady state?






30. What obligate extracellular fungus is silver stain - positive and is associated with pneumonia in patients with AIDS?






31. In what rare lung malignancy have 90% of patients had an occupational exposure to asbestos?






32. What is the term for the day after the LH surge in the female cycle?






33. Clue cells are associated with which organism that causes vaginal discharge?






34. What pancreatic islet cell secretes somatostatin?






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






36. Is the hydrophobic or hydrophilic end of the phospholipids of the cell membrane facing the aqueous environment?






37. How are resistance and length related regarding flow?






38. What pneumoconiosis is associated with exposure to the following occupations or materials? - Aerospace industry - nuclear reactors






39. In a negatively skewed curve is the mean greater than the mode?






40. What is the signal to open the voltage - gated transmembrane sodium channels?






41. What tract carries unconscious proprioceptive information from the Golgi tendon organs and muscle spindles to the cerebellum - helping monitor and modulate muscle movements?






42. Does physiologic splitting of the first heart sound occur during inspiration or expiration? Why?






43. What is the major difference between the veins in the face and the veins in the rest of the body?






44. What syndrome arises from mutation in the fibrillin gene (FBN1) on chromosome 15q21?






45. Name the compartment of the mediastinum associated with the following thoracic structures: SVC






46. What is the major stimulus for cell division in chondroblasts?






47. How does ventricular depolarization take place - base to apex or vice versa?






48. What renal side effect is commonly seen in patients taking lithium?






49. What phase of Interphase is haploid (N)?






50. What two PGs are used to induce labor?