1 / 6

Lesson #10: Enzymes and temperature

Lesson #10: Enzymes and temperature. Objective: - How temperature and pH affects rate of enzymes. Activity #1: eggs anyone?. - Observe and record how the temperature is affecting the three eggs. - Think, pair, share with your neighbour reasons for any changes to the eggs.

chun
Télécharger la présentation

Lesson #10: Enzymes and temperature

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lesson #10: Enzymes and temperature Objective: - How temperature and pH affects rate of enzymes

  2. Activity #1: eggs anyone? - Observe and record how the temperature is affecting the three eggs. - Think, pair, share with your neighbour reasons for any changes to the eggs.

  3. Enzymes and temperature • Enzyme activity gradually increases with temperature until around 37ºC (body temperature) • As the temperature continues to rise, the rate of reaction falls rapidly, as heat energy denatures the enzyme.

  4. Enzyme and pH • pH can alter an enzyme’s shape. • Different enzymes work best at different pH values. For ex, intestinal enzymes have an optimum pH of about 7.5. Enzymes in the stomach have an optimum pH of about 2.

  5. Activity #2 • The test tubes all have the same protein but liquids with different pH’s: neutral, acidic, alkaline • Based on your knowledge of the digestive system, write a hypothesis.

  6. Practical • Add 1ml of starch solution and saliva to each of the 3 test tubes. • Place 1 test tube in each water bath. • Every 30 seconds, use the glass rod to remove a drop from each solution and place it on the white tile. • Add a drop of iodine to each solution, record the time of when it does not change colour • Record your results in a data table and graph.

More Related