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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. Measures physical base pair distance






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






3. Repeated replication w/o cell division






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






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






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






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






8. Circular and double stranded






9. RNA protein-complex






10. 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.






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






12. Gene duplication






13. 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.






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






15. Can undergo both lytic and lysogenic cycle






16. Possess an F plasmid that also includes some DNA taken from the bacterial genome. Sometimes it is formed by incorrect excision from the chromosome


17. FAD-2 - NADP-3






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






19. Val - Leu - Ile - Ala - Met






20. Krebs cycle enzyme






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






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






23. Isoelectric point and MW






24. Gene has multiple effects






25. Neutralizes H2O2 - found in lysosomes






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






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






28. Phe - Trp - Tyr - Gly - Pro






29. 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






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






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






32. Makes Acetyl-CoA from pyruvate






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






34. 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






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






36. Do not contain F factor






37. Can serve as a primer


38. Triglycerides - cholesterols - and phospholipids






39. Enzymes in Krebs cycle that produce NADH






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






41. Failure of chromosome pairs to separate during meiosis






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






43. Operon 1/2 - gene 1/6






44. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis






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






46. Vitamin B1 - cofactor that aids in dehydrogenase mostly






47. Actin - myosin - and other muscle proteins






48. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






49. Only one carbon center is changed






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