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






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






3. PKa = pH






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






5. Can undergo both lytic and lysogenic cycle






6. Val - Leu - Ile - Ala - Met






7. Enzymes in Krebs cycle that produce NADH






8. Measures physical base pair distance






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






10. Irreversible reaction that require ATP first part of glycolosis






11. Vitamin B1 - cofactor that aids in dehydrogenase mostly






12. Gene has multiple effects






13. Can serve as a primer






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






15. Enter cells freely






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






17. Cleaves on C terminal side of lysine and arginine






18. Makes Acetyl-CoA from pyruvate






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






20. RNA protein-complex






21. MRNA






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






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






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






25. Gene duplication






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






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






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






29. 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






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






31. 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 -






32. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






33. Neutralizes H2O2 - found in lysosomes






34. Triglycerides - cholesterols - and phospholipids






35. Actin - myosin - and other muscle proteins






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






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






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






39. Isoelectric point and MW






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






41. Repeated replication w/o cell division






42. 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.






43. FAD-2 - NADP-3






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






45. 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.






46. Ser - Cys - Thr - Gln - Asn






47. Do not contain F factor






48. 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.






49. Krebs cycle enzyme






50. Only one carbon center is changed