Test your basic knowledge |

GRE Biochemistry

Subjects : gre, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • 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. 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






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






3. Failure of chromosome pairs to separate during meiosis






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






5. Enzymes in Krebs cycle that produce NADH






6. Can undergo both lytic and lysogenic cycle






7. Measures physical base pair distance






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






9. PKa = pH






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






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






12. Derived from golgi vesicles






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






14. Actin - myosin - and other muscle proteins






15. 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






16. Krebs cycle enzyme






17. FAD-2 - NADP-3






18. Cleaves on C terminal side of lysine and arginine






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






20. Triglycerides - cholesterols - and phospholipids






21. Neutralizes H2O2 - found in lysosomes






22. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






23. Gene has multiple effects






24. Isoelectric point and MW






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






26. Gene duplication






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






28. Do not contain F factor






29. Circular and double stranded






30. Makes Acetyl-CoA from pyruvate






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






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






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






34. 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






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






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






37. MRNA






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






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






41. 1e-14






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






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






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






45. The most important regulatory enzyme of glycolysis. It is an allosteric enzyme made of 4 subunits and controlled by many activators and inhibitors. PFK-1 catalyzes the important 'committed' step of glycolysis - the conversion of fructose 6-phosphate






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






47. 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.






48. Only one carbon center is changed






49. Phe - Trp - Tyr - Gly - Pro






50. Repeated replication w/o cell division