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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. Cis faces the ER and trans faces the plasma membrane






2. 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






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






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






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






6. Val - Leu - Ile - Ala - Met






7. Cleaves on C terminal side of lysine and arginine






8. Isoelectric point and MW






9. Gene has multiple effects






10. Irreversible reaction that require ATP first part of glycolosis






11. Operon 1/2 - gene 1/6






12. Can undergo both lytic and lysogenic cycle






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






14. Vitamin B1 - cofactor that aids in dehydrogenase mostly






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






16. Krebs cycle enzyme






17. FAD-2 - NADP-3






18. Circular and double stranded






19. RNA protein-complex






20. 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.






21. Repeated replication w/o cell division






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






23. 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.






24. 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






25. Derived from golgi vesicles






26. Can serve as a primer

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27. Neutralizes H2O2 - found in lysosomes






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






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






30. Do not contain F factor






31. Actin - myosin - and other muscle proteins






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






33. 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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34. Gene duplication






35. 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






36. MRNA






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






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






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






40. Enzymes in Krebs cycle that produce NADH






41. 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 -






42. Measures physical base pair distance






43. Enter cells freely






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






45. 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






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






47. Failure of chromosome pairs to separate during meiosis






48. Phe - Trp - Tyr - Gly - Pro






49. Triglycerides - cholesterols - and phospholipids






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