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






2. Isoelectric point and MW






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






4. 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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5. An enzyme that removes a phosphate group from its substrate






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






7. 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






8. PKa = pH






9. Krebs cycle enzyme






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






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






12. 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






13. Enter cells freely






14. Only one carbon center is changed






15. Makes Acetyl-CoA from pyruvate






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






17. RNA protein-complex






18. Repeated replication w/o cell division






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






20. Irreversible reaction that require ATP first part of glycolosis






21. 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 -






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






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






24. 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.






25. Operon 1/2 - gene 1/6






26. 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.






27. Measures physical base pair distance






28. 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.






29. Phe - Trp - Tyr - Gly - Pro






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






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






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






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






34. MRNA






35. Vitamin B1 - cofactor that aids in dehydrogenase mostly






36. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






38. 1e-14






39. Gene duplication






40. Failure of chromosome pairs to separate during meiosis






41. Val - Leu - Ile - Ala - Met






42. Neutralizes H2O2 - found in lysosomes






43. Triglycerides - cholesterols - and phospholipids






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






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






46. 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






47. Can undergo both lytic and lysogenic cycle






48. FAD-2 - NADP-3






49. Derived from golgi vesicles






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