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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.
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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. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.






2. Irreversible reaction that require ATP first part of glycolosis






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






4. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity






5. Neutralizes H2O2 - found in lysosomes






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






7. Possess F factor as a plasmid independent of the bacterial genome. The F plasmid contains only F factor DNA and no DNA from the bacterial genome.






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






9. Only one carbon center is changed






10. 1e-14






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






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






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






14. Makes Acetyl-CoA from pyruvate






15. Krebs cycle enzyme






16. (His - Arg - Lys +) - (Glu - Asp -)






17. 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.






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






19. Val - Leu - Ile - Ala - Met






20. Enter cells freely






21. Possess F factor integrated into the bacterial genome. After integration into the host chromosomal DNA - these plasmids possess portions of - or entire - F factor and portions of the bacterial genome.






22. RNA protein-complex






23. Triglycerides - cholesterols - and phospholipids






24. Ser - Cys - Thr - Gln - Asn






25. Derived from golgi vesicles






26. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes






27. Phe - Trp - Tyr - Gly - Pro






28. MRNA






29. 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






30. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated






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






32. Secondary messenger - used for intracellular signal transduction - such as transferring the effects of hormones like glucagon and adrenaline - which cannot pass through the cell membrane. It is involved in the activation of protein kinases and regula






33. Actin - myosin - and other muscle proteins






34. Failure of chromosome pairs to separate during meiosis






35. Circular and double stranded






36. Gprotein association - exchanges GDP to GTP - converts AMP into cyclic AMP. Cyclic AMP binds to protein kinase A: Protein kinase A phosphorylates phosphorylase kinase. increases Ca which binds calmodulin proteins which then binds to phosphorylase kin






37. Operon 1/2 - gene 1/6






38. Cis faces the ER and trans faces the plasma membrane






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






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






41. Gene duplication






42. Can serve as a primer

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43. Do not contain F factor






44. FAD-2 - NADP-3






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






46. Cleaves on C terminal side of lysine and arginine






47. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).






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






49. Measures physical base pair distance






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