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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. Can serve as a primer

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






3. Irreversible reaction that require ATP first part of glycolosis






4. Ser - Cys - Thr - Gln - Asn






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






6. Operon 1/2 - gene 1/6






7. 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.






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






9. FAD-2 - NADP-3






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






11. Gene duplication






12. Makes Acetyl-CoA from pyruvate






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






14. 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






15. RNA protein-complex






16. 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






17. Do not contain F factor






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






19. Repeated replication w/o cell division






20. Isoelectric point and MW






21. Derived from golgi vesicles






22. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






23. Can undergo both lytic and lysogenic cycle






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






25. Failure of chromosome pairs to separate during meiosis






26. Krebs cycle enzyme






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






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






29. MRNA






30. Enter cells freely






31. Val - Leu - Ile - Ala - Met






32. 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






33. Only one carbon center is changed






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






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






36. PKa = pH






37. Cleaves on C terminal side of lysine and arginine






38. 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.






39. Vitamin B1 - cofactor that aids in dehydrogenase mostly






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






41. 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






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






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






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






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






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






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






48. Triglycerides - cholesterols - and phospholipids






49. 1e-14






50. 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.