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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. Gene has multiple effects






2. Actin - myosin - and other muscle proteins






3. Cleaves on C terminal side of lysine and arginine






4. Can undergo both lytic and lysogenic cycle






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






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






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






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






9. Isoelectric point and MW






10. Measures physical base pair distance






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






12. Phe - Trp - Tyr - Gly - Pro






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






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






15. Enzymes in Krebs cycle that produce NADH






16. 1e-14






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






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






19. Val - Leu - Ile - Ala - Met






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






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






22. Irreversible reaction that require ATP first part of glycolosis






23. 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






24. Circular and double stranded






25. 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






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






28. Vitamin B1 - cofactor that aids in dehydrogenase mostly






29. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






30. Repeated replication w/o cell division






31. 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.






32. RNA protein-complex






33. Krebs cycle enzyme






34. 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.






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






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






37. 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.






38. Triglycerides - cholesterols - and phospholipids






39. Do not contain F factor






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






41. 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






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






43. Only one carbon center is changed






44. Ser - Cys - Thr - Gln - Asn






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






46. Can serve as a primer

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






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






49. PKa = pH






50. 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