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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. Circular






2. Unzips the DNA double Helix






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






4. Bonds between NAG & NAG or NAM & NAM






5. Where RNA polymerase starts






6. Breaks down lactase






7. Location of transcription






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






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






10. Components of the CW linked by peptide bonds






11. Cuts the introns out of mRNA






12. Lays down DNA nucleotides






13. Spontaneous - doesn't require energy






14. Non-coding regions on mRNA






15. Lactose binds to repressor and it releases from operator






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






17. The last - ending codon that terminates the sequence






18. Construction site to build proteins from mRNA and tRNA






19. Nicotinamide Adenine Dinuecleotide






20. Covalent bonds between amino acids






21. The empty space between the CW & the CM






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






23. Binds to promoter which stops promotion of lactose






24. Series of amino acids held together by peptide bonds






25. Protein channel






26. Stains the LPS of the gram negative bacteria






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






28. Found the transforming factor to be DNA






29. Stains gram negative and gram positive bacteria






30. Bond between amino acids in a protein






31. Process of using mRNA to create proteins






32. Initiates transcription






33. A sequence of three nucleotide in DNA & RNA






34. Comma shaped






35. 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+






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






37. Place where repressor binds - where RNA polymerase binds






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






39. Membrane surrounding the cytoplasm






40. 2 - 3 carbon molecules with 2 phosphates






41. Acts as a mordant






42. Energy required






43. 'four'






44. The process of creating mRNA using DNA






45. Released from a lipopolysaccharide in a Gram - bacterium






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






47. Loss of e-






48. Not spontaneous - requires energy






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






50. Purine adenine - ribose and 3 phosphates