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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. Enzymes in Krebs cycle that produce NADH






2. Val - Leu - Ile - Ala - Met






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






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






6. 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






7. FAD-2 - NADP-3






8. Failure of chromosome pairs to separate during meiosis






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






10. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






11. 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.






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






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






14. 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






15. Can serve as a primer

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16. Only one carbon center is changed






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






18. Vitamin B1 - cofactor that aids in dehydrogenase mostly






19. 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.






20. Operon 1/2 - gene 1/6






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






22. Irreversible reaction that require ATP first part of glycolosis






23. Isoelectric point and MW






24. Enter cells freely






25. Repeated replication w/o cell division






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






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






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






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






30. RNA protein-complex






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






32. Makes Acetyl-CoA from pyruvate






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






34. Gene has multiple effects






35. Ser - Cys - Thr - Gln - Asn






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






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






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






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






40. Do not contain F factor






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






42. Neutralizes H2O2 - found in lysosomes






43. Actin - myosin - and other muscle proteins






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






45. MRNA






46. Krebs cycle enzyme






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






48. 1e-14






49. Triglycerides - cholesterols - and phospholipids






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







Sorry!:) No result found.

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