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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. LPS layer of a Gram Negative bacterium






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






3. Bond between amino acids in a protein






4. The last - ending codon that terminates the sequence






5. Loss of e-






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






7. Not spontaneous - requires energy






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






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






10. Components of the CW linked by peptide bonds






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






12. Place where repressor binds - where RNA polymerase binds






13. Rod shaped






14. Bonds between NAG and NAM






15. Replicated in fragments known as Okazaki Fragments






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






17. 'chain'






18. Break down of molecules






19. Many amino acids bonded together with peptide bonds






20. Attraction






21. Purine adenine - ribose and 3 phosphates






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






23. Transfer RNA that attaches to amino acids






24. Stains the LPS of the gram negative bacteria






25. Nicotinamide Adenine Dinuecleotide






26. Found the double helicle structure of DNA






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






28. Monomers of proteins






29. Polymer of carbohydrates joined together by glycosidic bonds






30. Initiates transcription






31. Coding regions on mRNA






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






33. Has 2 layers CW - CM






34. 2 phosphates attached to glucose forming a 6 carbon compound & 2Pi (1 phosphate glucose) - ATP becomes ADP - done twice to make a 1 -6 glucose - phosphorolates and makes NAD+






35. Membrane surrounding the cytoplasm






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






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






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






39. Build up of molecules






40. Breaks down lactase






41. Spiral






42. Okazaki fragments are than linke






43. Bonds between NAG & NAG or NAM & NAM






44. The empty space between the CW & the CM






45. Keeps the DNA strands separated






46. Location of transcription






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






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






49. Spontaneous - doesn't require energy






50. 'cluster'