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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. Gene has multiple effects






2. Triglycerides - cholesterols - and phospholipids






3. 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 -






4. Ser - Cys - Thr - Gln - Asn






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






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






7. Enter cells freely






8. Only one carbon center is changed






9. Irreversible reaction that require ATP first part of glycolosis






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






11. Do not contain F factor






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






13. 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






14. Can serve as a primer

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






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






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

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






19. Val - Leu - Ile - Ala - Met






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






21. Phe - Trp - Tyr - Gly - Pro






22. 1e-14






23. Vitamin B1 - cofactor that aids in dehydrogenase mostly






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






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






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






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






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






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






30. Gene duplication






31. Failure of chromosome pairs to separate during meiosis






32. 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.






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






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






35. Repeated replication w/o cell division






36. FAD-2 - NADP-3






37. RNA protein-complex






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. Makes Acetyl-CoA from pyruvate






40. Operon 1/2 - gene 1/6






41. Derived from golgi vesicles






42. Measures physical base pair distance






43. Circular and double stranded






44. 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.






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






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






47. Enzymes in Krebs cycle that produce NADH






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






49. 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






50. Can undergo both lytic and lysogenic cycle