Test your basic knowledge |

GRE Biochemistry

Subjects : gre, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • 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. Neutralizes H2O2 - found in lysosomes






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






4. Cleaves on C terminal side of lysine and arginine






5. Only one carbon center is changed






6. Irreversible reaction that require ATP first part of glycolosis






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






8. Ser - Cys - Thr - Gln - Asn






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






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






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






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






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






14. 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 -






15. Gene duplication






16. 1e-14






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






18. 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.






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






20. Krebs cycle enzyme






21. Val - Leu - Ile - Ala - Met






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






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






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






25. MRNA






26. Enzymes in Krebs cycle that produce NADH






27. FAD-2 - NADP-3






28. RNA protein-complex






29. Gene has multiple effects






30. Repeated replication w/o cell division






31. Measures physical base pair distance






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






33. 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






34. Operon 1/2 - gene 1/6






35. PKa = pH






36. Can serve as a primer






37. 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.






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






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






40. 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






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






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






44. Enter cells freely






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






46. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






48. Triglycerides - cholesterols - and phospholipids






49. The most important regulatory enzyme of glycolysis. It is an allosteric enzyme made of 4 subunits and controlled by many activators and inhibitors. PFK-1 catalyzes the important 'committed' step of glycolysis - the conversion of fructose 6-phosphate






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