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






3. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






4. Makes Acetyl-CoA from pyruvate






5. Measures physical base pair distance






6. RNA protein-complex






7. Val - Leu - Ile - Ala - Met






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






9. Can undergo both lytic and lysogenic cycle






10. Do not contain F factor






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






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






13. 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 -






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






15. Enter cells freely






16. Cleaves on C terminal side of lysine and arginine






17. 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






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






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






20. Actin - myosin - and other muscle proteins






21. Vitamin B1 - cofactor that aids in dehydrogenase mostly






22. Enzymes in Krebs cycle that produce NADH






23. Derived from golgi vesicles






24. Circular and double stranded






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






26. 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






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






28. Ser - Cys - Thr - Gln - Asn






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






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






31. Can serve as a primer






32. Neutralizes H2O2 - found in lysosomes






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






34. Phe - Trp - Tyr - Gly - Pro






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






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






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






38. PKa = pH






39. Only one carbon center is changed






40. Operon 1/2 - gene 1/6






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






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






43. Irreversible reaction that require ATP first part of glycolosis






44. Repeated replication w/o cell division






45. Krebs cycle enzyme






46. 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






47. Gene has multiple effects






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






49. 1e-14






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