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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. Gene duplication






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






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






4. 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.






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






6. Triglycerides - cholesterols - and phospholipids






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






8. Ser - Cys - Thr - Gln - Asn






9. MRNA






10. Can undergo both lytic and lysogenic cycle






11. Repeated replication w/o cell division






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






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






14. 1e-14






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






16. Vitamin B1 - cofactor that aids in dehydrogenase mostly






17. FAD-2 - NADP-3






18. Operon 1/2 - gene 1/6






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






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






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






22. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






23. PKa = pH






24. Measures physical base pair distance






25. Gene has multiple effects






26. Irreversible reaction that require ATP first part of glycolosis






27. Neutralizes H2O2 - found in lysosomes






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






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






30. Only one carbon center is changed






31. Val - Leu - Ile - Ala - Met






32. Failure of chromosome pairs to separate during meiosis






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






34. Derived from golgi vesicles






35. Circular and double stranded






36. 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 -






37. 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.






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






39. 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.






40. Can serve as a primer

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






42. Phe - Trp - Tyr - Gly - Pro






43. Makes Acetyl-CoA from pyruvate






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






45. 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






46. RNA protein-complex






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






48. Enter cells freely






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






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