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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 result in allele differences - suce as 3:1 and 1:3






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






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






4. Val - Leu - Ile - Ala - Met






5. Cleaves on C terminal side of lysine and arginine






6. FAD-2 - NADP-3






7. Neutralizes H2O2 - found in lysosomes






8. Makes Acetyl-CoA from pyruvate






9. PKa = pH






10. Enter cells freely






11. Do not contain F factor






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






13. Measures physical base pair distance






14. 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.






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






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






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






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






19. Phe - Trp - Tyr - Gly - Pro






20. 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






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






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






23. Irreversible reaction that require ATP first part of glycolosis






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






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






26. Actin - myosin - and other muscle proteins






27. Vitamin B1 - cofactor that aids in dehydrogenase mostly






28. Isoelectric point and MW






29. Only one carbon center is changed






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






31. 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






32. Circular and double stranded






33. Enzymes in Krebs cycle that produce NADH






34. Triglycerides - cholesterols - and phospholipids






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






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






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






38. Can serve as a primer

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39. 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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40. Can undergo both lytic and lysogenic cycle






41. RNA protein-complex






42. 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.






43. Repeated replication w/o cell division






44. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






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






47. 1e-14






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






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






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