Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
10th Edition
ISBN: 9780133922851
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Question
Chapter 41.2, Problem 3CC
Summary Introduction
To explain: Similarities between digestion of food in an animal and combustion of gasoline in an automobile.
Concept introduction:
Digestion is a catabolic process in the digestive tract, where the ingested food changes into simpler, soluble and diffusible substances that can be absorbed by the body.
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Introduction to Experiment 2: Protein Digestion by Pepsin
In this experiment, we will look at for evidence of protein digestion using albumin, a protein, and Biuret reagent. Biuret reagent is used to test for the presence of proteins, or more specifically, peptide bonds. When long polypeptide chains are present the solution will turn violet, and when shorter polypeptide chains are present the solution will turn a lighter pink color.
What is/are the end product(s) of protein digestion? Amino acids
What is the purpose of the enzyme pepsin? It helps in the digestion of proteins by breaking down the peptide bonds between amino acids into smaller peptides
If protein digestion has occurred, will the solution be violet or pink (choose one)?
Hypotheses/Predictions (See Methods section for details):
What color do you expect the solution to turn when the P tubes are mixed with Biuret solution and why?
P1
P2
P3
P4
The least protein digestion (or none at all) will take place in tubes…
Introduction to Experiment 2: Protein Digestion by Pepsin
In this experiment, we will look at for evidence of protein digestion using albumin, a protein, and Biuret reagent. Biuret reagent is used to test for the presence of proteins, or more specifically, peptide bonds. When long polypeptide chains are present the solution will turn violet, and when shorter polypeptide chains are present the solution will turn a lighter pink color.
What is/are the end product(s) of protein digestion? ____________________________________________________________
What is the purpose of the enzyme pepsin? _______________________________________________________________________
If protein digestion has occurred, will the solution be violet or pink (choose one)? _________________
Hypotheses/Predictions (See Methods section for details):
What color do you expect the solution to turn when the P tubes are mixed with Biuret solution and why?
P1…
Lesson 8: The Role of Enzymes
Focus on Inquiry
Scientists often make inferences. Recall that an inference is based on observations and previous
knowledge. An inference is not data, but it should be consistent with the data.
Recall that pH can affect the function of enzymes. A scientist was studying the digestive system of
alligators. Alligators have very acidic stomachs, but their intestines are closer to neutral. The scientist
identified two important enzymes in the digestive tract of alligators W-protease and T-protease.
She conducted an investigation into how a change in pH affected the activity of each enzyme. At the
conclusion of the investigation, she presented her findings in the line graph shown....
Digestive Enzyme Activity
Tan-protease
--- Wx-protease
4
6
10
12
pH
Based on these data and your knowledge of enzymes, what inferences can you draw about which
enzyme is most likely to be active in the alligator intestine and which is most likely to be active
in the stomach? Explain…
Chapter 41 Solutions
Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
Ch. 41.1 - An animal requires 20 amino acids to make...Ch. 41.1 - Prob. 2CCCh. 41.1 - WHAT IF? If a zoo animal eating ample food shows...Ch. 41.2 - Prob. 1CCCh. 41.2 - In what sense are nutrients from a recently...Ch. 41.2 - Prob. 3CCCh. 41.3 - Explain why a proton pump inhibitor, such as the...Ch. 41.3 - Thinking about our nutritional needs and feeding...Ch. 41.3 - Prob. 3CCCh. 41.4 - Prob. 1CC
Ch. 41.4 - What features of a mammal's digestive system make...Ch. 41.4 - WHAT IF? "Lactose-intolerant" people have a...Ch. 41.5 - Explain how people can become obese even if their...Ch. 41.5 - WHAT IF? Suppose you were studying two groups of...Ch. 41.5 - Prob. 3CCCh. 41 - Prob. 41.1CRCh. 41 - Propose an artificial diet that would eliminate...Ch. 41 - Prob. 41.3CRCh. 41 - How does human anatomy indicate that our primate...Ch. 41 - Prob. 41.5CRCh. 41 - Fat digestion yields fatty acids and glycerol....Ch. 41 - The mammalian trachea and esophagus both connect...Ch. 41 - Which of the following organs is incorrectly...Ch. 41 - Prob. 4TYUCh. 41 - After surgical removal of the gallbladder, a...Ch. 41 - If you were to jog 1 km a few hours after lunch,...Ch. 41 - DRAW IT Create a flowchart to summarize the events...Ch. 41 - Prob. 8TYUCh. 41 - SCIENTIFIC INQUIRY In human populations of...Ch. 41 - WRITE ABOUT A THEME: ORGANIZATION Hair is largely...Ch. 41 - SYNTHESIZE YOUR KNOWLEDGE Hummingbirds are well...
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