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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. Irreversible reaction that require ATP first part of glycolosis






2. 1e-14






3. Phe - Trp - Tyr - Gly - Pro






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






5. Measures physical base pair distance






6. 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 -






7. Can serve as a primer

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






9. Repeated replication w/o cell division






10. Operon 1/2 - gene 1/6






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






12. Makes Acetyl-CoA from pyruvate






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






14. Val - Leu - Ile - Ala - Met






15. 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






16. Gene has multiple effects






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






18. 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






19. Gene duplication






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






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






22. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






23. PKa = pH






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






25. MRNA






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






27. Ser - Cys - Thr - Gln - Asn






28. RNA protein-complex






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






30. 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.






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






32. Triglycerides - cholesterols - and phospholipids






33. Enter cells freely






34. 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.






35. FAD-2 - NADP-3






36. 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






37. Enzymes in Krebs cycle that produce NADH






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






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






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






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






42. Neutralizes H2O2 - found in lysosomes






43. Krebs cycle enzyme






44. Derived from golgi vesicles






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






46. Actin - myosin - and other muscle proteins






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






48. Do not contain F factor






49. Failure of chromosome pairs to separate during meiosis






50. Can undergo both lytic and lysogenic cycle