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






2. Makes Acetyl-CoA from pyruvate






3. Irreversible reaction that require ATP first part of glycolosis






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






5. Failure of chromosome pairs to separate during meiosis






6. Ser - Cys - Thr - Gln - Asn






7. Triglycerides - cholesterols - and phospholipids






8. Gene has multiple effects






9. 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






10. Do not contain F factor






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






12. Derived from golgi vesicles






13. Enter cells freely






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






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






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






17. FAD-2 - NADP-3






18. Circular and double stranded






19. Measures physical base pair distance






20. 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






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






22. 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






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






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






25. Only one carbon center is changed






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






27. Can undergo both lytic and lysogenic cycle






28. Isoelectric point and MW






29. Actin - myosin - and other muscle proteins






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






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






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






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






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






35. Phe - Trp - Tyr - Gly - Pro






36. 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.






37. 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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38. Serine protease that cleaves on c terminal side of aromatics






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






40. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






41. Neutralizes H2O2 - found in lysosomes






42. Gene duplication






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






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






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






46. 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.






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






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






49. 1e-14






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