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. 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






2. Do not contain F factor






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






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






5. FAD-2 - NADP-3






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






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






8. Enzymes in Krebs cycle that produce NADH






9. RNA protein-complex






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






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






12. Gene duplication






13. Neutralizes H2O2 - found in lysosomes






14. Gene has multiple effects






15. 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 -






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






17. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






18. Val - Leu - Ile - Ala - Met






19. 1e-14






20. 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.






21. MRNA






22. Triglycerides - cholesterols - and phospholipids






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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






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






26. Krebs cycle enzyme






27. Circular and double stranded






28. Irreversible reaction that require ATP first part of glycolosis






29. Isoelectric point and MW






30. 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






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






32. Failure of chromosome pairs to separate during meiosis






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






34. Only one carbon center is changed






35. PKa = pH






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






37. Measures physical base pair distance






38. 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






39. Can undergo both lytic and lysogenic cycle






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






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






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






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






44. 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.






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






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






47. Vitamin B1 - cofactor that aids in dehydrogenase mostly






48. Enter cells freely






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






50. 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