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






3. Vitamin B1 - cofactor that aids in dehydrogenase mostly






4. FAD-2 - NADP-3






5. Gene has multiple effects






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






7. RNA protein-complex






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






9. 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






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






11. Repeated replication w/o cell division






12. Derived from golgi vesicles






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






14. 1e-14






15. 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.






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






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






18. Circular and double stranded






19. Do not contain F factor






20. Can serve as a primer

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






22. Phe - Trp - Tyr - Gly - Pro






23. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






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






26. Makes Acetyl-CoA from pyruvate






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






28. The most important regulatory enzyme of glycolysis. It is an allosteric enzyme made of 4 subunits and controlled by many activators and inhibitors. PFK-1 catalyzes the important 'committed' step of glycolysis - the conversion of fructose 6-phosphate






29. Operon 1/2 - gene 1/6






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






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






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






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






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






35. 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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36. Failure of chromosome pairs to separate during meiosis






37. Enzymes in Krebs cycle that produce NADH






38. Isoelectric point and MW






39. Neutralizes H2O2 - found in lysosomes






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






41. Gene duplication






42. 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.






43. Enter cells freely






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






45. Triglycerides - cholesterols - and phospholipids






46. Ser - Cys - Thr - Gln - Asn






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






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






50. MRNA







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