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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. Released from a lipopolysaccharide in a Gram - bacterium






2. A set of codons that terminates the sequence (stop codon)






3. Polymer of carbohydrates joined together by glycosidic bonds






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






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






6. Are Restriction Enzymes






7. Rod shaped






8. Binds to promoter which stops promotion of lactose






9. 'pair'






10. Lactose binds to repressor and it releases from operator






11. Initiates transcription






12. Coding regions on mRNA






13. Non polar molecule component of the CM (the 'tail')






14. Build up of molecules






15. Where RNA polymerase starts






16. Bacteria cell that contains: CW - periplasmic space - & CM






17. The last - ending codon that terminates the sequence






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






19. Monomers of proteins






20. Stop free radicals from damaging cells - helps O trap e-






21. Bonds between NAG & NAG or NAM & NAM






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






23. That doesn't contain a nucleus or membrane bound organelles (small cell)






24. Found one to one ratio between base pairs






25. Loss of e-






26. Microbes; single celled microorganisms






27. Nicotinamide Adenine Dinuecleotide






28. Acts as a mordant






29. Replicated in fragments known as Okazaki Fragments






30. Comma shaped






31. Is an enzyme that cuts double-stranded or single stranded DNA at specific recognition sites






32. NAD+ and a hydrogen - e- carrier






33. Is an enzyme that glues the sticky or the blunt ends to join the strands






34. Stains gram negative and gram positive bacteria






35. 2-layer permeable membrane that forms a continuous barrier around a cell






36. Attraction






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






38. Purine adenine - ribose and 3 phosphates






39. 'chain'






40. Replicated continuously






41. 'four'






42. Okazaki fragments are than linke






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






44. The chemical process in which glucose is broken down into two parts






45. Stains the LPS of the gram negative bacteria






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






47. Breaks down lactase






48. Lagging strand

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49. Found the transforming factor to be DNA






50. Covalent bonds between amino acids