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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. Serine protease that cleaves on c terminal side of aromatics






2. Actin - myosin - and other muscle proteins






3. Gene duplication






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






5. RNA protein-complex






6. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






8. FAD-2 - NADP-3






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






10. MRNA






11. 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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12. Vitamin B1 - cofactor that aids in dehydrogenase mostly






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






14. Triglycerides - cholesterols - and phospholipids






15. Circular and double stranded






16. 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






17. 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






18. Neutralizes H2O2 - found in lysosomes






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






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






21. Enzymes in Krebs cycle that produce NADH






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. An enzyme that removes a phosphate group from its substrate






24. Operon 1/2 - gene 1/6






25. Measures physical base pair distance






26. Krebs cycle enzyme






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






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






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






30. Do not contain F factor






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






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






33. 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.






34. Ser - Cys - Thr - Gln - Asn






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






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






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






38. Derived from golgi vesicles






39. Can undergo both lytic and lysogenic cycle






40. Irreversible reaction that require ATP first part of glycolosis






41. Isoelectric point and MW






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






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






44. Only one carbon center is changed






45. Val - Leu - Ile - Ala - Met






46. Failure of chromosome pairs to separate during meiosis






47. Cleaves on C terminal side of lysine and arginine






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






49. 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 -






50. 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.