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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. Can undergo both lytic and lysogenic cycle






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






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






4. 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






5. 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.






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






7. 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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8. 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 -






9. Neutralizes H2O2 - found in lysosomes






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






11. 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.






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






13. 1e-14






14. MRNA






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






16. Measures physical base pair distance






17. Cleaves on C terminal side of lysine and arginine






18. Do not contain F factor






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






20. FAD-2 - NADP-3






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






22. Failure of chromosome pairs to separate during meiosis






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






24. Makes Acetyl-CoA from pyruvate






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






26. Phe - Trp - Tyr - Gly - Pro






27. Operon 1/2 - gene 1/6






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






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






30. Triglycerides - cholesterols - and phospholipids






31. Actin - myosin - and other muscle proteins






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






33. Derived from golgi vesicles






34. Val - Leu - Ile - Ala - Met






35. Repeated replication w/o cell division






36. Ser - Cys - Thr - Gln - Asn






37. PKa = pH






38. 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






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






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






41. Circular and double stranded






42. RNA protein-complex






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






44. Isoelectric point and MW






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






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






47. 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.






48. Vitamin B1 - cofactor that aids in dehydrogenase mostly






49. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






50. Gene has multiple effects