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. How many carbons do estrogens have?






2. What hematological malignancy is particularly likely to affect patients with Down syndrome?






3. What artery supplies most of the lateral surfaces of the cerebral hemispheres?






4. What is the major pulmonary side effect of






5. 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?






6. What is the MCC of the following endocarditis scenarios? - Following biliary infections






7. If the pH is low with increased CO2 levels and decreased HCO3- levels - What is the acid - base disturbance?






8. What is the name for the most prominent spinous process?






9. What inhibitor of microtubule synthesis is the drug of choice for whipworm and pinworm?






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






11. What is the only specific Ag - presenting cell?






12. Which CNs act as the sensory and motor components of the gag reflex?






13. What is the rate - limiting enzyme of glycogen synthesis?






14. Abs to what hepatitis B Ag provide immunity?






15. What enzyme - induced by insulin and activated by apo C- II - is required for chylomicron and VLDL metabolism?






16. What happens to the following during skeletal muscle contraction? - Actin and myosin lengths






17. What is the first formal IQ test used today for children aged 2 to 18?






18. What coronary artery vasculitis is seen in Japanese infants and children less than 4 years old with acute febrile illness - conjunctivitis - maculopapular rash - and lymphadenopathy?






19. Arrange the following layers in the correct sequence through which a needle must pass in a lumbar puncture - Skin x Subarachnoid space x Interspinous ligament x Dura mater x Deep fascia x Epidural space x Superficial fascia x Interlaminar space x Su






20. What is the name of hydrophilic pores that allow the direct passage of ions and particles between two adjacent cells?






21. Match the chromosome and haploid number with the stage of sperm development - spermatid - spermatocyte (primary or secondary) - spermatogonia (type A or B): x 46/2n (divide meiotically)






22. What is the function of white rami communicantes?






23. What is the pyrimidine intermediate that joins PRPP (5- Phosphoribosyl -1- Pyrophosphate)?






24. At what vertebral levels does the aortic arch begin and end?






25. What malignant neoplasm of the bone has a soap bubble appearance on radiograph?






26. What vessels carry deoxygenated blood into the lungs from the right ventricle?






27. Progesterone has __________ activities.






28. What is the most common one? - Primary tumor metastasis to the bone






29. What branch off the vertebral artery supplies x The ventrolateral two - thirds of the cervical spinal cord and the ventrolateral part of the medulla?






30. Name the type of necrosis - Seen as dead tissue with coagulative necrosis






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






32. What must be supplemented in patients with medium - chain acyl CoA dehydrogenase (MCAD) deficiency?






33. What viral infection is associated with black vomit?






34. Regarding the viral growth curve - is the external virus present before or after the latent period?






35. What mushroom poisoning is associated with fulminant hepatitis with extensive liver necrosis?






36. What are the following changes seen in the luminal fluid by the time it leaves the PCT of the nephron? - Concentration of CHO - AA - ketones - peptides






37. What are the two most common chains of the TCR?






38. What is the most common one? - Site for carcinoid tumors






39. Can be secreted.






40. What is the term for the load on a muscle in the relaxed state?






41. What is the term for how well a drug produces its desired response?






42. What muscles insert in or on the intertubercular groove of the humerus?

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43. The dose of which second - generation sulfonylurea agent must be decreased for patients with hepatic dysfunction?

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44. Which major cell type is found in the red pulp of the spleen?






45. What organism causes Q fever?






46. Name the bony articulations of the following sites. Be specific. Wrist






47. What vessel is lacerated in an epidural hematoma?






48. What type of hallucination occurs during awakening?






49. What is the term for thickened - hyperpigmented skin in the axillae - groin - and skin folds associated with malignancies - obesity - and DM?






50. Name the most common type or cause - Spontaneous pneumothorax