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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. MRNA






2. Actin - myosin - and other muscle proteins






3. 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.






4. Vitamin B1 - cofactor that aids in dehydrogenase mostly






5. Ser - Cys - Thr - Gln - Asn






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






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






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






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






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






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






12. 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.






13. Gene has multiple effects






14. Circular and double stranded






15. Enter cells freely






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






17. Measures physical base pair distance






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






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






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






21. 1e-14






22. Triglycerides - cholesterols - and phospholipids






23. Operon 1/2 - gene 1/6






24. Krebs cycle enzyme






25. Do not contain F factor






26. FAD-2 - NADP-3






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






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






29. 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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30. Only one carbon center is changed






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






32. Failure of chromosome pairs to separate during meiosis






33. Enzymes in Krebs cycle that produce NADH






34. Val - Leu - Ile - Ala - Met






35. Cleaves on C terminal side of lysine and arginine






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






37. Irreversible reaction that require ATP first part of glycolosis






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






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






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






41. Neutralizes H2O2 - found in lysosomes






42. Derived from golgi vesicles






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






44. Repeated replication w/o cell division






45. 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






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






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






48. Makes Acetyl-CoA from pyruvate






49. 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






50. Can serve as a primer

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