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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. Do not contain F factor






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






3. Val - Leu - Ile - Ala - Met






4. Gene has multiple effects






5. Enzymes in Krebs cycle that produce NADH






6. 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






7. Only one carbon center is changed






8. Phe - Trp - Tyr - Gly - Pro






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






11. Actin - myosin - and other muscle proteins






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






13. Enter cells freely






14. RNA protein-complex






15. MRNA






16. 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.






17. Gene duplication






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






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






20. 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.






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






22. Cleaves on C terminal side of lysine and arginine






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






24. Vitamin B1 - cofactor that aids in dehydrogenase mostly






25. Circular and double stranded






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






27. 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 -






28. Derived from golgi vesicles






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






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






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






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






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






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






35. FAD-2 - NADP-3






36. Repeated replication w/o cell division






37. Operon 1/2 - gene 1/6






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






39. PKa = pH






40. Neutralizes H2O2 - found in lysosomes






41. Triglycerides - cholesterols - and phospholipids






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






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






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. 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.






46. Irreversible reaction that require ATP first part of glycolosis






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






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






49. Isoelectric point and MW






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