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GRE Biochemistry

Subjects : gre, science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. Cis faces the ER and trans faces the plasma membrane






2. Can result in allele differences - suce as 3:1 and 1:3






3. An enzyme that removes a phosphate group from its substrate






4. Dynins and kinesins (movement) - cilia and flagella






5. Irreversible reaction that require ATP first part of glycolosis






6. RNA protein-complex






7. Isoelectric point and MW






8. Enter cells freely






9. Derived from golgi vesicles






10. Gene has multiple effects






11. Gene duplication






12. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)






13. Contain their own DNA - mRNA - and proteins to synthesize more






14. Acts as a coenzyme in all transamination reactions - and in some decarboxylation and deamination reactions of amino acids. The aldehyde group of PLP forms a Schiff-base linkage (internal aldimine) with the e-amino group of a specific lysine group of






15. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high






16. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






17. Val - Leu - Ile - Ala - Met






18. Serine protease that cleaves on c terminal side of aromatics






19. Preferable to hydrolysis (like in the breakdown of glycogen or starch - as in the example above) because glucose 1-phosphate yields more ATP than does free glucose when subsequently catabolized to pyruvate.






20. PKa = pH






21. Circular and double stranded






22. Actin - myosin - and other muscle proteins






23. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation






24. Neutralizes H2O2 - found in lysosomes






25. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA






26. Repeated replication w/o cell division






27. Only one carbon center is changed






28. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis






29. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes






30. Makes Acetyl-CoA from pyruvate






31. When exons are arranged in multiple orders after removal of introns






32. Failure of chromosome pairs to separate during meiosis






33. 1e-14






34. Measures physical base pair distance






35. Can serve as a primer

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36. Nuclear lamins - desmins - keratins - internexins (structure)






37. Donates electrons to form a bond such as N in amines and O in alcohols






38. Krebs cycle enzyme






39. Operon 1/2 - gene 1/6






40. Phe - Trp - Tyr - Gly - Pro






41. = pKa+ log(B/A) - -log(Ka)






42. Recruits RecA protein - inhibited by LexA - results in mutagenesis






43. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes






44. Can undergo both lytic and lysogenic cycle






45. Enzymes in Krebs cycle that produce NADH






46. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades






47. Ser - Cys - Thr - Gln - Asn






48. Triglycerides - cholesterols - and phospholipids






49. Cleaves on C terminal side of lysine and arginine






50. FAD-2 - NADP-3