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






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






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






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






5. Operon 1/2 - gene 1/6






6. Val - Leu - Ile - Ala - Met






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






8. 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.






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






10. Ser - Cys - Thr - Gln - Asn






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






12. Actin - myosin - and other muscle proteins






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






14. Makes Acetyl-CoA from pyruvate






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






16. Circular and double stranded






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






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






19. Failure of chromosome pairs to separate during meiosis






20. 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 -






21. Irreversible reaction that require ATP first part of glycolosis






22. 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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23. Recruits RecA protein - inhibited by LexA - results in mutagenesis






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






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






26. Repeated replication w/o cell division






27. Isoelectric point and MW






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






29. Krebs cycle enzyme






30. 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






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






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






33. Do not contain F factor






34. MRNA






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






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






37. Only one carbon center is changed






38. Triglycerides - cholesterols - and phospholipids






39. Vitamin B1 - cofactor that aids in dehydrogenase mostly






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






41. RNA protein-complex






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






43. Gene duplication






44. Enzymes in Krebs cycle that produce NADH






45. 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.






46. 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






47. Derived from golgi vesicles






48. Gene has multiple effects






49. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






50. Can serve as a primer

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