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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. 'water loving' (polar molecules) ie. Phosphate head






2. Removes Crystal Violet color from the gram negative bacteria






3. Process of using mRNA to create proteins






4. Initiates transcription






5. Keeps the DNA strands separated






6. Cell that contains a nucleus and membrane bound organelles (big cell)






7. Signals the start of DNA replication






8. Murein; consists of sugars & amino acids that make a mesh-like layer outside the CW






9. Coding regions on mRNA






10. Spontaneous - doesn't require energy






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






12. Microbes; single celled microorganisms






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






14. Stains the LPS of the gram negative bacteria






15. 'pair'






16. Transfer RNA that attaches to amino acids






17. Membrane surrounding the cytoplasm






18. Build up of molecules






19. 'four'






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






21. Not spontaneous - requires energy






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






23. Bonds between NAG and NAM






24. Series of amino acids held together by peptide bonds






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






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






27. Messenger RNA that leaves the nucleus with the genetic code for a protein






28. Place where repressor binds - where RNA polymerase binds






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






30. Released from a lipopolysaccharide in a Gram - bacterium






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






32. 2-layer permeable membrane that forms a continuous barrier around a cell






33. Cuts the introns out of mRNA






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






35. Gain of e-






36. NAD+ and a hydrogen - e- carrier






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






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






39. Purine adenine - ribose and 3 phosphates






40. The first - leading codon in a sequence of codons (AUG)






41. The empty space between the CW & the CM






42. 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+






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






44. Location of transcription






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






46. Leading strand


47. Monomers of proteins






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






49. Found DNA to be the genetic material in cells






50. Loss of e-