CAMPBELL BIOLOGY,VOL.II >CUSTOM<
17th Edition
ISBN: 9781323803677
Author: Urry
Publisher: PEARSON
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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.
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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 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?…
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…
Chapter 41 Solutions
CAMPBELL BIOLOGY,VOL.II >CUSTOM<
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...
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- 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_forwardBoth the esophagus and the small intestine are involved in the digestion of food. The esophagus squeezes food into the stomach by wave-like muscle contractions. Peptidase enzymes in the small intestine break food molecules into smaller molecules. Which statement best describes changes to food during digestion? O The muscle contractions result in physical changes, while the action of the peptidase results in chemical changes. O The muscle contractions and the action of the peptidase both result only in physical changes. O The muscle contractions result in chemical changes, while the action of the peptidase results in physical changes. O The muscle contractions and the action of the peptidase both result only in chemical changes. 8. 9. 10 11 12 13 14 15 16 17 20 近arrow_forwardDigestion of proteins in the acidic environment of the stomach is carried out by the enzyme pepsin. A different enzyme, called trypsin, digests proteins in the neutral environment of our small intestine. The amount of each enzyme are the same and the amount of substrate is the same between the stomach and small intestine. Explain why our bodies use two different enzymes to digest proteins in the stomach and the small intestine.arrow_forward
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