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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.
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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. Repeated replication w/o cell division






2. Val - Leu - Ile - Ala - Met






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






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






5. Can undergo both lytic and lysogenic cycle






6. Gene has multiple effects






7. Enzymes in Krebs cycle that produce NADH






8. Vitamin B1 - cofactor that aids in dehydrogenase mostly






9. Do not contain F factor






10. 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






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






12. Phe - Trp - Tyr - Gly - Pro






13. RNA protein-complex






14. Irreversible reaction that require ATP first part of glycolosis






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






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






17. Operon 1/2 - gene 1/6






18. Ser - Cys - Thr - Gln - Asn






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






20. Gene duplication






21. 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.






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






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






24. 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






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






26. Isoelectric point and MW






27. Enter cells freely






28. Only one carbon center is changed






29. 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






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






31. Derived from golgi vesicles






32. Failure of chromosome pairs to separate during meiosis






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






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






35. MRNA






36. 1e-14






37. Neutralizes H2O2 - found in lysosomes






38. 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.






39. Makes Acetyl-CoA from pyruvate






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






41. Circular and double stranded






42. Triglycerides - cholesterols - and phospholipids






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






44. Measures physical base pair distance






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






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






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






48. FAD-2 - NADP-3






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






50. Cleaves on C terminal side of lysine and arginine







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