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


2. 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 -






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






4. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






5. Gene duplication






6. Irreversible reaction that require ATP first part of glycolosis






7. FAD-2 - NADP-3






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






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






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






11. Ser - Cys - Thr - Gln - Asn






12. Krebs cycle enzyme






13. Phe - Trp - Tyr - Gly - Pro






14. Only one carbon center is changed






15. Actin - myosin - and other muscle proteins






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






17. Repeated replication w/o cell division






18. 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.






19. 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






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






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






22. Makes Acetyl-CoA from pyruvate






23. MRNA






24. Do not contain F factor






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






26. Val - Leu - Ile - Ala - Met






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






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






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






30. Operon 1/2 - gene 1/6






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






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. Isoelectric point and MW






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






35. Can undergo both lytic and lysogenic cycle






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






37. Triglycerides - cholesterols - and phospholipids






38. Neutralizes H2O2 - found in lysosomes






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






40. 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.






41. Gene has multiple effects






42. Enzymes in Krebs cycle that produce NADH






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






44. Cleaves on C terminal side of lysine and arginine






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






46. Derived from golgi vesicles






47. Vitamin B1 - cofactor that aids in dehydrogenase mostly






48. 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






49. RNA protein-complex






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.