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DSST Biochemistry 2

Subjects : dsst, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • 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. Stop free radicals from damaging cells - helps O trap e-






2. Cuts the introns out of mRNA






3. Purine adenine - ribose and 3 phosphates






4. Non-coding regions on mRNA






5. 'chain'






6. One of the four bases in mRNA (replaces thymine)






7. LPS layer of a Gram Negative bacterium






8. Bonds between NAG and NAM






9. Protein that makes RNA primers and makes mRNA from DNA






10. Where RNA polymerase starts






11. Break down of molecules






12. Released from a lipopolysaccharide in a Gram - bacterium






13. The codon on tRNA that matches up with and attaches to a codon on mRNA






14. Has 2 layers CW - CM






15. Keeps the DNA strands separated






16. 'water fearing' (non polar molecules) ie. Lipid tail






17. Removes Crystal Violet color from the gram negative bacteria






18. How strong a molecule/atom can pull e-






19. Bacteria cell that contains: OM - CW - periplamic space - & CM






20. Gain of e-






21. Location of transcription






22. Lagging strand

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23. Lays down DNA nucleotides






24. It is the two single stranded regions of DNA that is being replicated






25. Series of amino acids held together by peptide bonds






26. NAD+ and a hydrogen - e- carrier






27. Comma shaped






28. Stains the LPS of the gram negative bacteria






29. Are Restriction Enzymes






30. Polar molecule component of the CM (the 'head')






31. Monomers of proteins






32. Found the transforming factor to be DNA






33. Phosphate is added to a molecule to make it unstable. Molecule more easily broken now.






34. Process of using mRNA to create proteins






35. 'four'






36. How cells use energy stored in food and molecules to make ATP






37. Many amino acids bonded together with peptide bonds






38. Makes a repressor - binds to promoter/operator to stop RNA polymerase






39. Attraction






40. Stains the Lipid A of gram positive bacteria cell wall






41. Initiates transcription






42. Lays down RNA Primase to indicate the start of replication






43. Breaks down lactase






44. Chains of molecules attached to the CW of a Gram + bacterium






45. Glyceraldyhyde 3 Phosphaet Dehydrogenase - phosphorolates and reduces NAD by adding 2e- and a H+






46. Replicated continuously






47. Where the double stranded end came a part and the complimentary start join






48. (LPS); lipids and polysaccharides linked together by covalent bonds






49. Is a code in which it is the same code forward as it is backwards - restriction sites






50. Polymer of carbohydrates joined together by glycosidic bonds