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






2. Phe - Trp - Tyr - Gly - Pro






3. Makes Acetyl-CoA from pyruvate






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






5. Cleaves on C terminal side of lysine and arginine






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






7. 1e-14






8. Measures physical base pair distance






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






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






11. Gene has multiple effects






12. Irreversible reaction that require ATP first part of glycolosis






13. Can undergo both lytic and lysogenic cycle






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






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






16. MRNA






17. Val - Leu - Ile - Ala - Met






18. 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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19. PKa = pH






20. FAD-2 - NADP-3






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






22. Gene duplication






23. Krebs cycle enzyme






24. Derived from golgi vesicles






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






26. Only one carbon center is changed






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






28. Actin - myosin - and other muscle proteins






29. Failure of chromosome pairs to separate during meiosis






30. Triglycerides - cholesterols - and phospholipids






31. Neutralizes H2O2 - found in lysosomes






32. 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.






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






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






35. Enzymes in Krebs cycle that produce NADH






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






37. 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






38. Isoelectric point and MW






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






40. 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






41. Can serve as a primer

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42. 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 -






43. 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






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






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






46. 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.






47. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






49. RNA protein-complex






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