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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. 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.






2. Ser - Cys - Thr - Gln - Asn






3. Actin - myosin - and other muscle proteins






4. 1e-14






5. RNA protein-complex






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






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






8. Val - Leu - Ile - Ala - Met






9. Operon 1/2 - gene 1/6






10. Failure of chromosome pairs to separate during meiosis






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






12. FAD-2 - NADP-3






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






14. MRNA






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. Repeated replication w/o cell division






17. Neutralizes H2O2 - found in lysosomes






18. Can undergo both lytic and lysogenic cycle






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






20. Gene has multiple effects






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






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






23. Makes Acetyl-CoA from pyruvate






24. Triglycerides - cholesterols - and phospholipids






25. Acts as a coenzyme in all transamination reactions - and in some decarboxylation and deamination reactions of amino acids. The aldehyde group of PLP forms a Schiff-base linkage (internal aldimine) with the e-amino group of a specific lysine group of






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






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






28. 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






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






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






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






32. Can serve as a primer

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






34. Isoelectric point and MW






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






36. Circular and double stranded






37. Cleaves on C terminal side of lysine and arginine






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






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






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






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






42. Vitamin B1 - cofactor that aids in dehydrogenase mostly






43. Phe - Trp - Tyr - Gly - Pro






44. Derived from golgi vesicles






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






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. 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 -






48. Do not contain F factor






49. Enzymes in Krebs cycle that produce NADH






50. 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.