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






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






3. RNA protein-complex






4. FAD-2 - NADP-3






5. Repeated replication w/o cell division






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






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






8. Measures physical base pair distance






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






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






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






12. MRNA






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






14. Can undergo both lytic and lysogenic cycle






15. 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






16. Phe - Trp - Tyr - Gly - Pro






17. 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 -






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






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






20. Failure of chromosome pairs to separate during meiosis






21. Triglycerides - cholesterols - and phospholipids






22. Neutralizes H2O2 - found in lysosomes






23. Isoelectric point and MW






24. Derived from golgi vesicles






25. Makes Acetyl-CoA from pyruvate






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






27. 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.






28. PKa = pH






29. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






30. 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.






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






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. Operon 1/2 - gene 1/6






34. Circular and double stranded






35. Vitamin B1 - cofactor that aids in dehydrogenase mostly






36. Enzymes in Krebs cycle that produce NADH






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






38. 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.






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






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






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






42. Val - Leu - Ile - Ala - Met






43. Can serve as a primer

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






45. 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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46. Krebs cycle enzyme






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






48. Gene duplication






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






50. Actin - myosin - and other muscle proteins