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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. When does the primitive gut herniate out of the embryo? When does it go back into the embryo?






2. What type of hypersensitivity is a T cell - mediated response to Ags that are not activated by Ab or complement?






3. Heinz bodies






4. What sphingolipid cannot be produced without sialic acid and amino sugars?






5. What four CN carry preganglionic parasympathetic fibers?






6. What two drugs block dopa - decarboxylase in the periphery to decrease the conversion of L- dopa to dopamine?






7. In what disease is there a genetic absence of UDP- glucuronate transferase - resulting in an increase in free unconjugated bilirubin?






8. From What aortic arch are the following structures derived?






9. Are the following responses associated with histamines H1 or H2 receptor activation? - Bronchial smooth muscle activity






10. Name the lipoprotein based on the following characteristics - apo A-1 - apo E - apo C- II






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






12. Objective tests that base the result of the examination on a preset standard use what form of reference?






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






14. During what stage of B- cell development is IgM first seen on the surface?






15. Name the end product or products: x Fatty acid oxidation






16. Outburst to cover up true feelings (emotion is covered - not redirected).






17. What test is used to screen for HIV?






18. What thalamic relay nucleus do the mammillary bodies project to?






19. What component of the ETC is inhibited by the following? - Rotenone






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






21. What Vi - encapsulated gram - negative motile anaerobic rod that produces H2S is associated with enteric fever - gastroenteritis - and septicemia?






22. What are the rules of 2 for Meckel diverticulum?






23. What type of chromatin is transcriptionally active?






24. What type of erythema do you see in x Stevens - Johnson syndrome?






25. How many base pairs upstream is the prokaryotic TATA box promoter?






26. What Ig is responsible for Antibody- Dependent Cell - mediated Cytotoxicity of parasites - has a high - affinity Fc receptor on mast cells and basophils - and is responsible for the allergic response?






27. What intermediate enables propionyl CoA to enter into the TCA cycle?






28. At What age do children begin to understand the irreversibility of death?






29. What syndrome is associated with the following brainstem lesions? - Vertebral artery or anterior spinal artery occlusion - resulting in contralateral corticospinal tract and medial lemniscus tract deficits and an ipsilateral CN XII lesion






30. What nematode is known as hookworms? What is the treatment?






31. What is the term to describe a decrease in the cell size and function usually associated with disuse?






32. Name the reaction that appears in babies who are temporarily deprived of their usual caretaker. (This reaction usually begins around 6 months of age - peaks around 8 months - and decreases at 12 months.)






33. What two factors result in the base of the lung being hyperperfused?






34. What condition results in a strawberry gallbladder?






35. What two post - transcriptional enzymes in collagen synthesis require ascorbic acid to function properly?






36. What glycogen storage disease is due to the following enzyme deficiencies? - Muscle phosphorylase

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37. What is the key issue surrounding teenagers' maturation?






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






39. What cell in bone is a part of the mononuclear phagocytic system?






40. What is the term for the total percentage of correct answers selected on a screening test?






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






42. What hypothalamic hormone is synthesized in the preoptic nucleus?






43. What vector is associated with malaria?






44. What is the most common lethal AR disorder affecting white Americans?






45. What mast cell mediator is a chemotactic agent?






46. Regarding the viral growth curve - is the internal virus present before or after the eclipse period?






47. What are the two opsonizing factors?






48. Name the most common one - Chromosomal disorder






49. What tract carries the ipsilateral dorsal column fibers from the upper limbs in the spinal cord?






50. What fungus causes endocarditis in IV drug users?