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USMLE Step 1 Prep
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USMLE Step 1 Prep
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25 Questions

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

2. What three AAs must patients with maple syrup urine disease not eat?

3. What cerebral vessel size is affected in patients with vascular dementia?

4. What three cephalosporins inhibit vitamin K- dependent factors?

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

6. Which phenotype of osteogenesis imperfecta is incompatible with life?

7. Name the eukaryotic DNA polymerase based on the following information: x Synthesizes the lagging strand during replication

8. What is the term for excessive production of collagen that flattens out and does not extend beyond the site of the injury?

9. Name the primary vesicle the following structures are derived from (proencephalon - mesencephalon - or rhombencephalon) - Cerebral hemispheres

10. Which form of alcohol toxicity results in ocular damage?

11. What is the site of action of the following? - Loop diuretics

12. What is the most common one? - Viral cause of myocarditis

13. What type of mortality rate is defined as the number of deaths x From a specific cause per population?

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

15. What is the term for the number of Ag - binding sites on an Ig?

16. 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?

17. What operant conditioning therapy or modification is described as x Reinforcing successive attempts that lead to the desired goal (gradual improvement)?

18. Which organism causes trench fever?

19. Readily diffuses across the blood - brain barrier.

20. What area of the lymph node contains germinal centers?

21. What form of nephritic syndrome is associated with celiac sprue and Henoch - Sch

22. What drug is used to prevent alcohol consumption by blocking aldehyde dehydrogenase?

23. What tumor is seen in the 2- to 4-year - old age group; does not cross the midline; has immature glomeruli - tubules - and stroma; and metastasizes late to the lungs?

24. What is the name of the exotoxin Shigella dysenteriae produces - which interferes with the 60S ribosomal subunit and results in eukaryotic protein synthesis inhibition?

25. What enzyme is deficient in acute intermittent porphyria?