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PEX-08-03 - Exercise 8 Chemical and Physical Processes of...

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Exercise 8: Chemical and Physical Processes of Digestion: Activity 3: Assessing Pepsin Digestion of Protein Lab Report Pre-lab Quiz Results You scored 20% by answering 1 out of 5 questions correctly. 1. Where in the body does protein digestion begin? Your answer : a. the mouth Correct answer: b. the stomach 2. The substrate for pepsin is Your answer : e. protein, peptides, and starch. Correct answer: d. protein and peptides. 3. In this activity the substrate you will be using to detect protein digestion is You correctly answered: d. BAPNA. 4. Negative results with the negative controls Your answer : a. are expected. Correct answer: d. are expected and validate the experiment. 5. A spectrophometer measures Your answer : b. starch concentration. Correct answer: c. optical density. 11/02/11 page 1
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11/02/11 page 2 Experiment Results Predict Question: Predict Question: At which pH do you think pepsin will have the highest activity? Your answer : a. pH 2.0 Stop & Think Questions: Which of the following tubes are negative control tubes? Your answer : a. tube 2 Correct answer: e. tubes 3 and 4
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