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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 element is needed for the proper alignment of tropocollagen molecules?






2. Name the associated chromosome - Chronic lymphocytic leukemia (CLL)






3. Name the ocular lesion; be specific - Right calcarine cortex lesion






4. What hormones - secreted in proportion to the size of the placenta - are an index of fetal well - being?






5. What enveloped RNA retrovirus infects CD4 T cells and uses the enzyme reverse transcriptase?






6. Name the primary vesicle the following structures are derived from (proencephalon - mesencephalon - or rhombencephalon) - Third ventricle






7. What hemoflagellate species is the cause of Chagas disease?






8. What negative sense RNA virus is associated with parotitis - pancreatitis - and orchitis?






9. What neurotransmitter is essential for maintaining a normal BP when an individual is standing?






10. What is the most common one? - Type of PUD






11. What is the most common site for implantation of the blastocyst?






12. Which class of antihypertensives produces angioedema - hyperkalemia - and a dry cough?






13. Have catalase.






14. What is the term for the potential difference across a cell membrane?






15. What enzyme catalyzes the rate - limiting step in purine synthesis?






16. What very aggressive lung cancer metastasizes early and is associated with smoking and paraneoplastic syndromes?






17. What statistical test checks to see whether the groups are different by comparing the means of two groups from a single nominal variable?






18. What is the term for transverse bands on the fingernails seen in patients with chronic arsenic poisoning?






19. What nematode is known as threadworms? What is the treatment?






20. Which streptococcal species is characterized by being catalase negative - turning bile esculin agar black - producing a positive PYR test - and resulting in biliary and urinary tract infections?






21. Name the lung measurement based on the following descriptions: x Amount of air in the lungs after maximal expiration






22. Regarding the Lac operon - for What do the following genes code? - Z gene






23. Where are the lowest resting PO2 levels in a resting individual?






24. What sweat gland type is associated with odor production and hair follicles and is found in the axilla?






25. Name the most common type or cause - Cyanotic heart disease






26. What area of the spleen consists of splenic cords of Billroth and phagocytoses RBCs?






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






28. Name the compartment of the mediastinum associated with the following thoracic structures: Aortic arch






29. Regarding the venous system - what happens to blood volume if there is a small change in pressure?






30. What is the DOC for severe infections with Sporothrix - Mucor - Histoplasma - Cryptococcus - Candida - and Aspergillus?






31. What segment of the gastrointestinal tract lacks villi - has crypts - and actively transports sodium out of its lumen?






32. Name the phase of the eukaryotic cell cycle: x Cells cease replicating (i.e. - nerve cell)






33. What is the only DNA virus that does not replicate its DNA in the nucleus of the host cell?






34. Name the thalamic nucleus based on its input and output - Input from the mammillary bodies via the mammillothalamic tract and the cingulated gyrus; output to the cingulated gyrus via the anterior limb of the internal capsule






35. Name these anxiety defense mechanisms: x Use of explanations to justify unacceptable behaviors.






36. What complement factor or factors are associated with x Opsonization?






37. What is the term for failure to give up infantile patterns of behavior for mature ones?






38. The DSM- IV- TR is scored on the basis of five axes of diagnosis. In What axis would you place x Clinical disorders (e.g. - schizophrenia)?






39. What sphingolipid is formed by the union of serine and palmitoyl CoA?






40. What is your diagnosis of a young - thin asymptomatic female with a midsystolic click on cardiac auscultation?






41. What vessel can be found atop the scalene anterior?






42. Name the stages of sleep with these EEG patterns: x Sleep spindles - K- complexes






43. Name the product or products of arachidonic acid: x Vasodilation






44. What antihistamine is used in the treatment of serotonergic crisis?






45. What remains patent in a hydrocele of the testis - allowing peritoneal fluid to form into a cyst?






46. Which hepatitis B Ag correlates with infectivity and viral proliferation?






47. What is the most common one? - Valve abnormality associated with rheumatic fever






48. What antitubercular agent requires vitamin B6 supplementation?






49. What component of the trigeminal nuclei x Supplies the muscles of mastication?






50. 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?