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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. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






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






5. Only one carbon center is changed






6. Makes Acetyl-CoA from pyruvate






7. Phe - Trp - Tyr - Gly - Pro






8. 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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9. Ser - Cys - Thr - Gln - Asn






10. Actin - myosin - and other muscle proteins






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






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






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






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






15. Circular and double stranded






16. 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.






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






18. Derived from golgi vesicles






19. RNA protein-complex






20. Enter cells freely






21. Failure of chromosome pairs to separate during meiosis






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






23. MRNA






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






25. Irreversible reaction that require ATP first part of glycolosis






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






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






28. 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






29. Enzymes in Krebs cycle that produce NADH






30. 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 -






31. 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.






32. Gene duplication






33. 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






34. Neutralizes H2O2 - found in lysosomes






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






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






37. Measures physical base pair distance






38. Repeated replication w/o cell division






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






40. Operon 1/2 - gene 1/6






41. Cleaves on C terminal side of lysine and arginine






42. Val - Leu - Ile - Ala - Met






43. 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






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






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






46. Do not contain F factor






47. Can undergo both lytic and lysogenic cycle






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






49. Isoelectric point and MW






50. Vitamin B1 - cofactor that aids in dehydrogenase mostly