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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. Isoelectric point and MW






2. 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






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






4. FAD-2 - NADP-3






5. Can undergo both lytic and lysogenic cycle






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






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






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






9. Possess an F plasmid that also includes some DNA taken from the bacterial genome. Sometimes it is formed by incorrect excision from the chromosome


10. MRNA






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






12. Enter cells freely






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






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






15. Do not contain F factor






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






17. 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






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






19. Gene has multiple effects






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






21. Makes Acetyl-CoA from pyruvate






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






23. Repeated replication w/o cell division






24. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






25. 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.






26. Circular and double stranded






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






28. Gene duplication






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






30. Phe - Trp - Tyr - Gly - Pro






31. Measures physical base pair distance






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






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






34. Operon 1/2 - gene 1/6






35. Irreversible reaction that require ATP first part of glycolosis






36. Krebs cycle enzyme






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






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






39. 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.






40. Triglycerides - cholesterols - and phospholipids






41. Cleaves on C terminal side of lysine and arginine






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






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






44. Derived from golgi vesicles






45. Vitamin B1 - cofactor that aids in dehydrogenase mostly






46. Actin - myosin - and other muscle proteins






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






48. Only one carbon center is changed






49. Ser - Cys - Thr - Gln - Asn






50. Can serve as a primer