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Biochemistry

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  • Answer 50 questions in 15 minutes.
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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 3 steps in RNA processing occur after transcription

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2. What substance in egg whites binds biotin






3. How many rings do purines have






4. What is the amino acid precursor for porphyrin and heme






5. What collagen type is most frequently affected in ehlers danlos and What are common complications






6. spheroid RBCs due to spectrin or ankyrin defect - hemolytic anemia - inc MHCH - splenectomy is curative






7. Synthesis of vit B3 requires what other vitamin






8. What are the blood glucose levels maintained by for days 1-3






9. What is incomplete penetrence and give an example






10. Which bond is stronger AT or CG and why? What is the laboratory consequence of this?






11. Inhibition of thymidilate synthase and and DHFR lead to decrease In what substance






12. What happens in the first stage of collagen synthesis - and Where does it happen






13. What is the active form of vit D






14. Which anti gout drugs work on microtubules






15. What happens in carnitine def






16. What leads to the deletion of the dystrophin gene in duchenne's muscular dystrophy






17. What is made fir rNucleotides or deoxyrNucleotides and what enzyme is necessary to convert one to the next






18. What happens on the oxidative arm of the HMP shunt and What is the key enzyme






19. What is the energy source after day 3 of starvation






20. What else can phosphoylate phosphorylase kinase






21. What is the defect in cystinuria






22. Where are cytosolic and organellar proteins made






23. cytoskeletal elements in micorvilli - muscle contracting fibers - cytokenesis - adherens jxns






24. What are the names and sources of the two types of vit D found in nature






25. What liberates glucose from glucose 6 P






26. depression - progressive dementia - choreiform movements - caudate atrophy and dec levels of GABA and ACH in the brain






27. What does lipoprotein lipase do






28. What is the breakdown product of NE






29. What is the activated carrier for electrons






30. How many rings do pyrimidines have






31. What are the reactants for glycolysis






32. What does the TCA cycle produce per 1 acetyl CoA






33. In base excision repaire - what recognizes and removes damaged bases and what cuts the DNA to remove the empty sugar






34. What does a phosphorylase do






35. Where is hexokinase found - What is its Km and Vmax and what uninduces it






36. What happens in a B12 def






37. What other complex is similar to the pyruvate dehydrogenase complex in that it has the same co - factors and generates succinyl - CoA






38. What residues are hydroxylated in step 2 of collagen synthesis - and What does this require






39. What enzyme results in classic galactosemia and What is the clinical






40. What does the mutation in the gene cause in protein synthesis






41. What happens with wet beriberi






42. What does a decrease in decrease in NADPH lead to and why






43. How does chloramphenicol work






44. What is the energy source for translocation






45. How does ouabain work






46. What does pancreatic lipase do






47. What does a phosphatase do






48. what findings are associated with marfans






49. What are the physical findings of fragile x syndrome






50. What catacholamine step is SAM required for







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