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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. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






3. RNA protein-complex






4. Circular and double stranded






5. Repeated replication w/o cell division






6. Can undergo both lytic and lysogenic cycle






7. Krebs cycle enzyme






8. Can serve as a primer

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






10. 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 -






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






12. Do not contain F factor






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






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






15. Makes Acetyl-CoA from pyruvate






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






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






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






19. Derived from golgi vesicles






20. Isoelectric point and MW






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






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






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






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






25. Only one carbon center is changed






26. Triglycerides - cholesterols - and phospholipids






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






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






29. Phe - Trp - Tyr - Gly - Pro






30. 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






31. 1e-14






32. 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.






33. Operon 1/2 - gene 1/6






34. 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.






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






36. MRNA






37. Failure of chromosome pairs to separate during meiosis






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






39. Gene has multiple effects






40. Gene duplication






41. Cleaves on C terminal side of lysine and arginine






42. Val - Leu - Ile - Ala - Met






43. Neutralizes H2O2 - found in lysosomes






44. Ser - Cys - Thr - Gln - Asn






45. Irreversible reaction that require ATP first part of glycolosis






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






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






48. Actin - myosin - and other muscle proteins






49. Measures physical base pair distance






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