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. PKa = pH






2. Makes Acetyl-CoA from pyruvate






3. Triglycerides - cholesterols - and phospholipids






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






5. Enzymes in Krebs cycle that produce NADH






6. Failure of chromosome pairs to separate during meiosis






7. Can undergo both lytic and lysogenic cycle






8. Cleaves on C terminal side of lysine and arginine






9. Enter cells freely






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






11. Val - Leu - Ile - Ala - Met






12. Irreversible reaction that require ATP first part of glycolosis






13. Gene has multiple effects






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






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






16. Actin - myosin - and other muscle proteins






17. 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 -






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






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






20. 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.






21. 1e-14






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






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






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






25. Vitamin B1 - cofactor that aids in dehydrogenase mostly






26. Derived from golgi vesicles






27. Repeated replication w/o cell division






28. Isoelectric point and MW






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






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






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






32. Phe - Trp - Tyr - Gly - Pro






33. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






35. Gene duplication






36. 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






37. Operon 1/2 - gene 1/6






38. 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






39. 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






40. Circular and double stranded






41. Measures physical base pair distance






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






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






44. FAD-2 - NADP-3






45. RNA protein-complex






46. MRNA






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. Serine protease that cleaves on c terminal side of aromatics






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