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






3. Failure of chromosome pairs to separate during meiosis






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






5. 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.






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






7. Do not contain F factor






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






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






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






11. Triglycerides - cholesterols - and phospholipids






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






13. Makes Acetyl-CoA from pyruvate






14. Only one carbon center is changed






15. Circular and double stranded






16. 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






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






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






19. Can undergo both lytic and lysogenic cycle






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






21. Krebs cycle enzyme






22. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






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






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






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






27. 1e-14






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






29. PKa = pH






30. 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






31. Measures physical base pair distance






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






33. Repeated replication w/o cell division






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






35. Can serve as a primer

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36. Derived from golgi vesicles






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






38. Isoelectric point and MW






39. 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






40. Enter cells freely






41. 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 -






42. Val - Leu - Ile - Ala - Met






43. 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.






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






45. Gene duplication






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






47. FAD-2 - NADP-3






48. Gene has multiple effects






49. Actin - myosin - and other muscle proteins






50. 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.