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






2. 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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3. Derived from golgi vesicles






4. Circular and double stranded






5. Measures physical base pair distance






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






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






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






9. Cleaves on C terminal side of lysine and arginine






10. Krebs cycle enzyme






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






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






13. Gene has multiple effects






14. MRNA






15. Only one carbon center is changed






16. Neutralizes H2O2 - found in lysosomes






17. Gene duplication






18. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






20. Triglycerides - cholesterols - and phospholipids






21. PKa = pH






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






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






24. Isoelectric point and MW






25. Operon 1/2 - gene 1/6






26. Can serve as a primer

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27. Failure of chromosome pairs to separate during meiosis






28. RNA protein-complex






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






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






31. Ser - Cys - Thr - Gln - Asn






32. 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.






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






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






35. Actin - myosin - and other muscle proteins






36. Makes Acetyl-CoA from pyruvate






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






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






39. 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 -






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






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






42. 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






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






44. 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






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






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






47. Can undergo both lytic and lysogenic cycle






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






49. Val - Leu - Ile - Ala - Met






50. Do not contain F factor