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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. Measures physical base pair distance






2. Vitamin B1 - cofactor that aids in dehydrogenase mostly






3. Triglycerides - cholesterols - and phospholipids






4. 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






5. Ser - Cys - Thr - Gln - Asn






6. 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






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






8. Phe - Trp - Tyr - Gly - Pro






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






10. Makes Acetyl-CoA from pyruvate






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






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






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






14. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






15. 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.






16. FAD-2 - NADP-3






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






18. Circular and double stranded






19. 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 -






20. Val - Leu - Ile - Ala - Met






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






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






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






24. Failure of chromosome pairs to separate during meiosis






25. RNA protein-complex






26. Can undergo both lytic and lysogenic cycle






27. Enter cells freely






28. MRNA






29. Isoelectric point and MW






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






31. 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.






32. Only one carbon center is changed






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






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






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






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






37. Repeated replication w/o cell division






38. Operon 1/2 - gene 1/6






39. Krebs cycle enzyme






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






41. 1e-14






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






43. Do not contain F factor






44. Neutralizes H2O2 - found in lysosomes






45. Gene duplication






46. Actin - myosin - and other muscle proteins






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






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






49. PKa = pH






50. 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.