Perform the tests described above. Since enzymes are not supposed to be used up, extract the piece of liver from the tube and add it to a second tube to which you then add more hydrogen peroxide. Pour the liquid from the first tube into a third tube of fresh hydrogen peroxide. Design and record some tests you have performed in the space below and on the next page. Protein function strongly depends on the shape of the protein.
Enzymes are proteins.
Changes in pH can alter the shape of proteins. Please go to the front of the classroom and examine several specimens of decalcified eggs. The acid will dissolve the egg shell, leaving the membranes intact, although the egg white will denature due to the pH. Similar eggs can be prepared by using acetic acid, although the results are much better with HCl. Use pH strips to test the pH of various solutions provided at your pod. Obtain three small test tubes and three equal-sized pieces of liver from the front desk.