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PhysioEx Lab Report Exercise 8: Chemical and Physical Processes of Digestion Activity 3: Assessing Pepsin Digestion of Protein

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PhysioEx Lab Report Exercise 8: Chemical and Physical Processes of Digestion Activity 3: Assessing Pepsin Digestion of Protein Name: Morris Date: 20 February 2026 Session ID: session-548796e3-c3da-0c11-1d4d-977215df4735 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 2/20/26, 3:40 PM Phys

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Institution
Central Arizona College
Course
BIO 202 (BIO202)

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2/20/26, 3:40 PM PhysioEx Exercise 8 Activity 3



PhysioEx Lab Report
Exercise 8: Chemical and Physical Processes of Digestion
Activity 3: Assessing Pepsin Digestion of Protein
Name: Morris
Date: 20 February 2026
Session ID: session-548796e3-c3da-0c11-1d4d-977215df4735

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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Institution
Central Arizona College
Course
BIO 202 (BIO202)

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Uploaded on
February 24, 2026
Number of pages
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Written in
2025/2026
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Questions & answers

Subjects

  • prot
  • physioex lab report exercise 8 chemical and physi
  • exercise 8 chemical and physical processes of dig
  • activity 3 assessing pepsin digestion of protein
  • where in the body does protein digestion begin
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