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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. Isoelectric point and MW






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






3. 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.






4. Measures physical base pair distance






5. MRNA






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






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






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






9. Cleaves on C terminal side of lysine and arginine






10. Enzymes in Krebs cycle that produce NADH






11. Derived from golgi vesicles






12. Do not contain F factor






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






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






15. Enter cells freely






16. FAD-2 - NADP-3






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






18. 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.






19. Actin - myosin - and other muscle proteins






20. Gene duplication






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






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






23. PKa = pH






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






25. 1e-14






26. Irreversible reaction that require ATP first part of glycolosis






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






28. 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.






29. Can serve as a primer

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30. Repeated replication w/o cell division






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






32. 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






33. Ser - Cys - Thr - Gln - Asn






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






35. Circular and double stranded






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






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






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






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






40. Gene has multiple effects






41. Failure of chromosome pairs to separate during meiosis






42. 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






43. Phe - Trp - Tyr - Gly - Pro






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






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






46. Neutralizes H2O2 - found in lysosomes






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






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






50. Operon 1/2 - gene 1/6







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