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Biochemistry

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 is the function of biotin






2. What does helicase do






3. How does ouabain work






4. What enzyme converts phenylalanine to tyrosin






5. If two alleles are present - but the active allele is deleted - what happens






6. Type IV collagen






7. Acetyl - CoA carboxylase catalyzes what rxn






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






9. What is codominance and give an example






10. What enzyme degrades a small amount of glycogen in lysosomes






11. What is the RDE of cholesterol synthesis






12. What causes Hartnup's disease






13. What is pleiotropy and given an example






14. What substances directly inhibit electron transport chain






15. What does inc phenylalanine lead to...






16. The pyruvate dehydrogenase complex serves In what reaction: products






17. What is a nonsense mutation






18. Type IV collagen is an important structural componenet of the BM for which 3 organs






19. What does apoCII do






20. What are the findings in PKU






21. What is the initial transcript called and What is the capped and tailed transcript called






22. Gene imprinting implies that How many alleles are active at a single locus






23. What is the defectin IV - hypertriglyceridemia






24. What is the hardy weinber heterozygote prevalence






25. What does the CFTR channel do in the lungs - GI tract and skin






26. In what direction are DNA and RNA synthesized

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27. What is loss of heterozygosity and give an example






28. Which part of the DNA binds RNA polymerase and multiple other TFs upstream from gene locus






29. An inability to convert orotic acid to UMP would be caused by a deficiency either of which two enzymes

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30. When does aspartate enter the urea cycle






31. What are the findings in Lesch - Nyhan






32. What does DNA ligase do






33. What does a defective Cl channel do






34. Where does gluconeogenesis primarily happen and What are other sites where the enzymes are located






35. What is the mutation in beckers muscular dystrophy - What is the severity and time of onset






36. What does vit C def cause






37. ADPKD is associated with What additional conditions






38. What is the physiologic role of dystrophin






39. What are the purely ketogenic amino acids






40. What lab value can distinguish orotic aciduria from ornithine transcarbamoylase def?






41. What is the activated carrier for Co2






42. What shape does the RNA generate during splicing and why?






43. What happens do glycogen in skeletal muscle during exercise






44. What are the results of unbalanced translocation






45. What are the functinos of vitamin A






46. What regulates whether FBPase -2 or PFK-2 is active






47. What is the amino acid precursor for GABA and glutathione






48. What substances inhibit phosphofructokinase -1






49. facial lesions - hypopigmented 'ash leaf spots -' cortical and retinal hamartomas - seizures - mental retardation - renal cysts - renal angiomyolipomas - cardiac rhabdomyomas - inc risk of astrocytomas






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