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






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






3. Gene has multiple effects






4. Measures physical base pair distance






5. PKa = pH






6. Gene duplication






7. Enter cells freely






8. Ser - Cys - Thr - Gln - Asn






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






10. MRNA






11. Isoelectric point and MW






12. 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






13. Neutralizes H2O2 - found in lysosomes






14. Phe - Trp - Tyr - Gly - Pro






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






16. 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.






17. Possess an F plasmid that also includes some DNA taken from the bacterial genome. Sometimes it is formed by incorrect excision from the chromosome


18. Cleaves on C terminal side of lysine and arginine






19. Vitamin B1 - cofactor that aids in dehydrogenase mostly






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






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






22. 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.






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






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






25. Irreversible reaction that require ATP first part of glycolosis






26. Val - Leu - Ile - Ala - Met






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






28. FAD-2 - NADP-3






29. Failure of chromosome pairs to separate during meiosis






30. Triglycerides - cholesterols - and phospholipids






31. Can serve as a primer


32. Can undergo both lytic and lysogenic cycle






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






34. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






35. Do not contain F factor






36. Repeated replication w/o cell division






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






38. 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






39. 1e-14






40. 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






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






42. Circular and double stranded






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






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






45. Enzymes in Krebs cycle that produce NADH






46. Operon 1/2 - gene 1/6






47. Makes Acetyl-CoA from pyruvate






48. Krebs cycle enzyme






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






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