B3 QUIZ

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  • Created by: Lily04
  • Created on: 29-05-17 10:55

1. Explain how temperature affects enzymes and the lock and key mechanism

  • at low temperatures the molecules lose energy; less collisions occur and the rate of reaction decreases meaning the reaction stops
  • As the temperature increases, the molecules gain more energy; more collisions occur and the rate of reaction increases. Above optimum temperature, the enzyme denatures and the reaction stops
  • it has no affect
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Other questions in this quiz

2. What is the structure of DNA and how many bases does it have ?

  • triple helix structure and 4 different bases
  • double helix structure and 2 different bases
  • double helix structure and 4 different bases
  • double helix structure and 10 different bases

3. Explain how PH levels affects enzymes.

  • if not at the optimum PH the active site will not fit with the substrate, as the enzyme molecule distorts (denatures) eventually meaning the substrate can longer fit to the active site.
  • It changes the optimum conditions making it harder for the substrate to fit in the active sie

4. Definition for metabollic rate

  • amount of energy your body needs
  • amount of energy your body wastes
  • amount of energy your body does not use

5. Name all the scientists involved in the discovery of DNA structure

  • Watson, Crick, Rosalind Franklin, Maurice Wilkins, Erwin Chargaff
  • Rosalind Franklin
  • Watson and Crick
  • Alexander Fleming and Rosalind Franklin
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