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






2. MRNA






3. Operon 1/2 - gene 1/6






4. Gene has multiple effects






5. Actin - myosin - and other muscle proteins






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






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






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






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






10. Neutralizes H2O2 - found in lysosomes






11. 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.






12. Irreversible reaction that require ATP first part of glycolosis






13. PKa = pH






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






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






16. RNA protein-complex






17. 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






18. 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






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






20. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






22. Vitamin B1 - cofactor that aids in dehydrogenase mostly






23. 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.






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






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






27. Only one carbon center is changed






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






29. Repeated replication w/o cell division






30. Cleaves on C terminal side of lysine and arginine






31. Can serve as a primer

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32. Enter cells freely






33. Measures physical base pair distance






34. Can undergo both lytic and lysogenic cycle






35. Makes Acetyl-CoA from pyruvate






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






37. Isoelectric point and MW






38. Phe - Trp - Tyr - Gly - Pro






39. Do not contain F factor






40. Failure of chromosome pairs to separate during meiosis






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






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






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






44. 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 -






45. Ser - Cys - Thr - Gln - Asn






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






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






48. Derived from golgi vesicles






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






50. 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