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






2. 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.






3. Gene has multiple effects






4. Measures physical base pair distance






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






6. 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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7. 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






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






9. Irreversible reaction that require ATP first part of glycolosis






10. 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 -






11. Neutralizes H2O2 - found in lysosomes






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






13. Can serve as a primer

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14. Can undergo both lytic and lysogenic cycle






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






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






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






18. Phe - Trp - Tyr - Gly - Pro






19. Do not contain F factor






20. Circular and double stranded






21. Makes Acetyl-CoA from pyruvate






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






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






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






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






26. Failure of chromosome pairs to separate during meiosis






27. 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.






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






29. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






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






32. 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






33. Repeated replication w/o cell division






34. Derived from golgi vesicles






35. Gene duplication






36. Cleaves on C terminal side of lysine and arginine






37. Operon 1/2 - gene 1/6






38. Enter cells freely






39. 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.






40. PKa = pH






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






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






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






44. Isoelectric point and MW






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






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






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






48. Actin - myosin - and other muscle proteins






49. Vitamin B1 - cofactor that aids in dehydrogenase mostly






50. Triglycerides - cholesterols - and phospholipids