PhysioEx Lab Report
Exercise 8: Chemical and Physical Processes of Digestion
Activity 3: Assessing Pepsin Digestion of Protein
Name:
Date: 10 July 2020
Session ID: session-0bc05dc9-6ffe-8acf-05c6-c85fa8002b99
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1 Where in the body does protein digestion begin?
You correctly answered: the stomach.
2 The substrate for pepsin is
You correctly answered: protein and peptides.
3 In this activity the substrate you will be using to detect protein digestion is
You correctly answered: BAPNA.
4 Negative results with the negative controls
You correctly answered: are expected and validate the experiment.
5 A spectrophometer measures
You correctly answered: optical density.
Experiment Results
Predict Question
1 Predict Question: At which pH do you think pepsin will have the highest activity?
Your answer: pH 2.0.
Stop & Think Questions
1 Which of the following tubes are negative control tubes?
You correctly answered: tubes 3 (pepsin, deionized water, pH 2.0 buffer) and 4 (deionized
water, BAPNA, pH 2.0 buffer).
2 An optical density greater than zero indicates that
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