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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. 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.






2. MRNA






3. Irreversible reaction that require ATP first part of glycolosis






4. Can undergo both lytic and lysogenic cycle






5. 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






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






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






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






9. Gene has multiple effects






10. Vitamin B1 - cofactor that aids in dehydrogenase mostly






11. Ser - Cys - Thr - Gln - Asn






12. Krebs cycle enzyme






13. Operon 1/2 - gene 1/6






14. Triglycerides - cholesterols - and phospholipids






15. 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






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






17. Failure of chromosome pairs to separate during meiosis






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






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






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






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






22. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






23. Do not contain F factor






24. 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






25. 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 -






26. FAD-2 - NADP-3






27. Derived from golgi vesicles






28. 1e-14






29. Can serve as a primer


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






31. Actin - myosin - and other muscle proteins






32. Gene duplication






33. Val - Leu - Ile - Ala - Met






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


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






36. Circular and double stranded






37. Cleaves on C terminal side of lysine and arginine






38. PKa = pH






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






40. Only one carbon center is changed






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






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






43. Isoelectric point and MW






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






45. 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.






46. Repeated replication w/o cell division






47. Makes Acetyl-CoA from pyruvate






48. 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.






49. Phe - Trp - Tyr - Gly - Pro






50. Measures physical base pair distance