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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. 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.






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






3. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate






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






5. 1e-14






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






7. Cleaves on C terminal side of lysine and arginine






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






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






10. Phosphotransferase - is a type of enzyme that transfers phosphate groups from high-energy donor molecules - such as ATP -[2] to specific substrates. The process is referred to as phosphorylation -






11. Irreversible reaction that require ATP first part of glycolosis






12. 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.






13. Repeated replication w/o cell division






14. Actin - myosin - and other muscle proteins






15. Enter cells freely






16. Enzymes in Krebs cycle that produce NADH






17. Val - Leu - Ile - Ala - Met






18. Can undergo both lytic and lysogenic cycle






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






20. Circular and double stranded






21. Krebs cycle enzyme






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






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






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






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






26. Triglycerides - cholesterols - and phospholipids






27. Gene has multiple effects






28. 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






29. MRNA






30. 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






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






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






33. Operon 1/2 - gene 1/6






34. Do not contain F factor






35. Phe - Trp - Tyr - Gly - Pro






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






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






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






39. RNA protein-complex






40. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






42. Failure of chromosome pairs to separate during meiosis






43. Neutralizes H2O2 - found in lysosomes






44. Measures physical base pair distance






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






46. Possess an F plasmid that also includes some DNA taken from the bacterial genome. Sometimes it is formed by incorrect excision from the chromosome

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47. Makes Acetyl-CoA from pyruvate






48. Vitamin B1 - cofactor that aids in dehydrogenase mostly






49. FAD-2 - NADP-3






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