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






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






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






4. 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.






5. Vitamin B1 - cofactor that aids in dehydrogenase mostly






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






7. Enter cells freely






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






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






10. Derived from golgi vesicles






11. Operon 1/2 - gene 1/6






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






13. Repeated replication w/o cell division






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






15. Irreversible reaction that require ATP first part of glycolosis






16. Actin - myosin - and other muscle proteins






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






18. Krebs cycle enzyme






19. 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






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






21. Cleaves on C terminal side of lysine and arginine






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






23. Val - Leu - Ile - Ala - Met






24. Circular and double stranded






25. 1e-14






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






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






28. Ser - Cys - Thr - Gln - Asn






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






30. FAD-2 - NADP-3






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






32. RNA protein-complex






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






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






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






36. Enzymes in Krebs cycle that produce NADH






37. Do not contain F factor






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. Dynins and kinesins (movement) - cilia and flagella






40. Failure of chromosome pairs to separate during meiosis






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






42. Gene duplication






43. Makes Acetyl-CoA from pyruvate






44. Triglycerides - cholesterols - and phospholipids






45. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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

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47. 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






48. Measures physical base pair distance






49. 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






50. MRNA