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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. Phe - Trp - Tyr - Gly - Pro






2. Neutralizes H2O2 - found in lysosomes






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






4. 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.






5. Derived from golgi vesicles






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






7. Repeated replication w/o cell division






8. Actin - myosin - and other muscle proteins






9. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






10. 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






11. Gene duplication






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






13. 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.






14. 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.






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






16. Irreversible reaction that require ATP first part of glycolosis






17. Gene has multiple effects






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






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






20. RNA protein-complex






21. Makes Acetyl-CoA from pyruvate






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






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






24. FAD-2 - NADP-3






25. Ser - Cys - Thr - Gln - Asn






26. Val - Leu - Ile - Ala - Met






27. 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






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






29. PKa = pH






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






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






32. Failure of chromosome pairs to separate during meiosis






33. Can undergo both lytic and lysogenic cycle






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






35. Only one carbon center is changed






36. Operon 1/2 - gene 1/6






37. 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






38. MRNA






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






40. Triglycerides - cholesterols - and phospholipids






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






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






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






44. 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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45. Circular and double stranded






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






47. Cleaves on C terminal side of lysine and arginine






48. Measures physical base pair distance






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






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