Campbell Biology: Custom Edition
18th Edition
ISBN: 9781323717271
Author: Urry, Cain, Wasserman, Minorsky, Reece
Publisher: PEARSON C
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 41.3, Problem 2CC
Thinking about our nutritional needs and feeding behavior, propose an evolutionary explanation for why amylase, unlike other digestive enzymes, is secreted into the mouth.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Introduction to Experiment 1: Starch Digestion by Amylase
In this experiment, we will look for evidence of starch digestion by testing solutions for the presence of starch and sugars. When starch is present, the iodine in Lugol’s solution turns the solution black, blue, or dark brown. If starch is not present, iodine will dye the solution a yellow color. Benedict’s reagent reacts with “reducing sugars,” including glucose, resulting in a green, orange, or red color. If sugars are not present, Benedict’s reagent remains a light blue color.
What is/are the end product(s) of starch digestion? _____________________________________________________________
What is the name of the enzyme that digests starch (amylose)? ________________________________________________
Hypotheses/Predictions (See Methods section for details):
When mixed with Lugol’s solution, test tube A1 (amylase only) will have what color and why? _____________…
Introduction to Experiment 1: Starch Digestion by Amylase
In this experiment, we will look for evidence of starch digestion by testing solutions for the presence of starch
and sugars. When starch is present, the iodine in Lugoks solution turns the solution black, blue, or dark
brown. If starch is not present, iodine will dye the solution a yellow color. Benedict's reagent reacts with
"reducing sugars," including glucese, resulting in a green, orange, or red color. If sugars are not present,
Benedict's reagent remains a light blue color.
1. What is/are the end product(s) of starch digestion?.
2. What is the name of the enzyme that digests starch (amylose)?
Hypotheses/Predictions (See Methods section for details):
1. When mixed with Lugol'ssolution, test tube A1 (amylase only) will have what color and why?
2. When mixed with Benedict's solution, test tube A1 (amylase only) will have what color and why?.
3.
When mixed with Lugols solution, test tube A2 (starch only) will have what color…
Introduction to Experiment 1: Starch Digestion by Amylase
In this experiment, we will look for evidence of starch digestion by testing solutions for the presence of starch
and sugars. When starch s present the lodine in Lugols solution turns the solution black, blue, or dark
beown If starch is not present, lodine will dye the solution a yellow color. Benedict's reagent reacts with
freducing sugars, Includinggucose, resulting in a green, orange, or red color. If sugars are not present,
Benedict s reagent remains a light blue color.
1. What is/are the end product(s) of starch digestion?
2. What is the name of the enzyme that digests starch (amylose)?
Hypotheses Predictions (See Methods section for details)
1. When mixed with Lugols solution, test tube Al (amylase only) will have what color and
why?
2. When mixed with Benedict's solution, test tube Al (amylase only) will have what color and
why?
3. When mixed with Lugols solution, test tube A2 (starch only) will have what color and why?…
Chapter 41 Solutions
Campbell Biology: Custom 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 - Prob. 5TYUCh. 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 - EVOLUTION CONNECTION Lizards and snakes cannot...Ch. 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...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Suppose that you perform an experiment to observe the effect of temperature and pH on the enzymatic activity of salivary amylase using the Iodine test, and starch as the substrate. Complete the table below: Temperature (°C) Color of solution Rank (1 - greatest digestion and 3 - least digestion) with I2 4 37 100 pH Color of solution Rank (1 - greatest digestion and 3 -least digestion) with I2 4 7 10arrow_forwardIntroduction 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…arrow_forwardIntroduction 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…arrow_forward
- Do we have evidence that amylase can effectively digest starch in the mouth? Say yes or no. If yes, explain what the evidence is from this experiment. If no, explain what results in our experiment would have to be different to give us this evidence.arrow_forwardA recent study (Prasath, G.S. et al., 2014) found that strawberries contain a compound called fisetin which slows the release of glucose into blood during fasting. This slowing occurs whether the glucose is generated from glycogen hydrolysis or gluconeogenesis. Propose an enzyme that fisetin inhibits and defend your answer. How does the intacellular concentration of citrate affect fructose 1,6-bis phosphatase? [If you cannot remember, try to deduce it.] Describe how this fits into cellular physiology. Describe a situation in gluconeogenesis where having a cytoplasmic and mitochondrial isoenzyme that can catalyze the same reaction provides a benefit. Can the energy in consumed ethanol be stored in glycogen? Explain.arrow_forwardHow does hydrochloric acid aid in the digestion of food? Hydrochloric acid breaks down the peptide bonds, glycosidic bonds, and acid anhydride bonds among proteins, carbohydrates, and lipids respectively. Hydrochloric acid does not really participate in the digestion of food; however, the acidic environment due to HCl activates pepsinogen which will be converted into pepsin that breaks down peptide bond between amino acids in a polypeptide. Hydrochloric acid is the gastric juice that stops lipid digestion in the stomach. Hydrochloric acid initiates carbohydrate and protein digestion in the stomach.arrow_forward
- Using specific examples from your learning in biochemistry, explain how glucose breakdown, storage and synthesis occurs and how it is regulated in humansarrow_forwardWhich of the following best describe protein digestion? . Protein digestion is a hydrolytic process regulated by pH changes in the gastro-intestinal track, and hormonal and enzyme releases at various stages of digestion. .. Protein digestion occurs during the gastric phase of digestion starting in the stomach. Protein digestion cleaves peptide bonds releasing peptides, and amino acids Protein digestion is a hydrolytic process involving proteases/ proteinases Protein digestion occurs at the active site of proteases and is effected by the catalytic triads.arrow_forwardThe stomach has two types of exocrine cells, chief cell which secrete an inactive form of the protein degesting enzymes pepsinogen, and parietal cells , which secrete hydrochloric acid that activates pepsinogen.Both cell types have an abundance of mitochondria ATP production.The chief cells need energy to synthesise pepsinogen and parietal cells need energy to transport hydrogen ions and chloride ions from the blood into the stomach lumen.Only one of this cell types has an extensive roung endoplasmic and abandant Golgi stacks. Would this be the chief cells or parietal cells?why?arrow_forward
- based on your knowledge of metabolism, describe why eating a fat free, but high calorie diet can lead to fat gain. Describe the specific pathways that sugar can take to become stored lipid.arrow_forwardWhen young rats are placed on a completely fat-free diet, they grow poorly, develop a scaly dermatitis, lose hair, and soon die. These symptoms can be prevented if linoleate or plant material is included in the diet. What makes linoleate an essential fatty acid? Animals lack the enzymes required to synthesize long-chain fatty acids with 14 or more carbons. Animals lack the enzymes required to synthesize odd-number fatty acids. Animals lack the enzymes required to synthesize polyunsaturated fatty acids. Animals lack the enzymes required to introduce double bonds into fatty acids beyond the A9 position.arrow_forwardWhich of the following statements is correct? O The brain prefers glucose as an energy source, but can use ketone bodies O Muscle cannot use fatty acids as an energy source O In a well-fed human, approximately equal amounts of energy are stored as glycogen and as triacylglycerol O Fatty acids cannot be used as an energy source in humans because humans lack the enzymes of the glyoxylate cycle Amino acids are a preferable energy source over fatty acids Search Siarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Animal Adaptations for Kids, Learn about physical, life cycle, and behavioral adaptations of animals; Author: Learn Bright;https://www.youtube.com/watch?v=m2MibjJgyjs;License: Standard youtube license