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






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






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






4. MRNA






5. Do not contain F factor






6. 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






7. Circular and double stranded






8. Repeated replication w/o cell division






9. Can serve as a primer

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10. 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.






11. Actin - myosin - and other muscle proteins






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






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






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






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






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






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






18. 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






19. 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.






20. Makes Acetyl-CoA from pyruvate






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






22. Derived from golgi vesicles






23. 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 -






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






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






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






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






28. Cleaves on C terminal side of lysine and arginine






29. Krebs cycle enzyme






30. Operon 1/2 - gene 1/6






31. FAD-2 - NADP-3






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






33. Enzymes in Krebs cycle that produce NADH






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






35. Vitamin B1 - cofactor that aids in dehydrogenase mostly






36. Neutralizes H2O2 - found in lysosomes






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






38. Phe - Trp - Tyr - Gly - Pro






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






40. Gene duplication






41. Measures physical base pair distance






42. Gene has multiple effects






43. 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






44. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






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






48. Only one carbon center is changed






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






50. Irreversible reaction that require ATP first part of glycolosis






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