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






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






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






4. Can undergo both lytic and lysogenic cycle






5. 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






6. 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.






7. Enzymes in Krebs cycle that produce NADH






8. Repeated replication w/o cell division






9. Failure of chromosome pairs to separate during meiosis






10. Val - Leu - Ile - Ala - Met






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






12. Phe - Trp - Tyr - Gly - Pro






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






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






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






16. Can serve as a primer


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






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






19. Irreversible reaction that require ATP first part of glycolosis






20. 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 -






21. Do not contain F factor






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






23. Cleaves on C terminal side of lysine and arginine






24. Circular and double stranded






25. Derived from golgi vesicles






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






27. 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






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






29. Measures physical base pair distance






30. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






31. FAD-2 - NADP-3






32. Operon 1/2 - gene 1/6






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






34. Enter cells freely






35. Isoelectric point and MW






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






37. 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.






38. Actin - myosin - and other muscle proteins






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






40. Neutralizes H2O2 - found in lysosomes






41. Ser - Cys - Thr - Gln - Asn






42. 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.






43. 1e-14






44. Gene duplication






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






46. Triglycerides - cholesterols - and phospholipids






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






48. Vitamin B1 - cofactor that aids in dehydrogenase mostly






49. 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






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