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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. Cis faces the ER and trans faces the plasma membrane






2. 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.






3. 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.






4. Val - Leu - Ile - Ala - Met






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






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






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






8. Phe - Trp - Tyr - Gly - Pro






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






10. Can serve as a primer

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11. 1e-14






12. 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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13. Triglycerides - cholesterols - and phospholipids






14. 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.






15. Operon 1/2 - gene 1/6






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






17. Neutralizes H2O2 - found in lysosomes






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






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






20. Irreversible reaction that require ATP first part of glycolosis






21. Repeated replication w/o cell division






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






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






24. Gene has multiple effects






25. Isoelectric point and MW






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






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






28. 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






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






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






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






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






33. Vitamin B1 - cofactor that aids in dehydrogenase mostly






34. Makes Acetyl-CoA from pyruvate






35. Can undergo both lytic and lysogenic cycle






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






37. RNA protein-complex






38. Failure of chromosome pairs to separate during meiosis






39. Enter cells freely






40. Ser - Cys - Thr - Gln - Asn






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






42. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






43. Do not contain F factor






44. 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






45. PKa = pH






46. MRNA






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






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






49. Circular and double stranded






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