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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. Operon 1/2 - gene 1/6






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






3. Phe - Trp - Tyr - Gly - Pro






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






5. Val - Leu - Ile - Ala - Met






6. 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.






7. MRNA






8. Ser - Cys - Thr - Gln - Asn






9. Can undergo both lytic and lysogenic cycle






10. Can serve as a primer

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11. 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






12. Measures physical base pair distance






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






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






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






17. Failure of chromosome pairs to separate during meiosis






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






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






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






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






22. 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






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






24. FAD-2 - NADP-3






25. Circular and double stranded






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






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






28. Enzymes in Krebs cycle that produce NADH






29. 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






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






31. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






33. Enter cells freely






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






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






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






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






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






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






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. RNA protein-complex






42. Irreversible reaction that require ATP first part of glycolosis






43. Gene duplication






44. Isoelectric point and MW






45. Derived from golgi vesicles






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






47. 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.






48. Do not contain F factor






49. Vitamin B1 - cofactor that aids in dehydrogenase mostly






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