Laboratory Manual For Human Anatomy & Physiology
4th Edition
ISBN: 9781260159363
Author: Martin, Terry R., Prentice-craver, Cynthia
Publisher: McGraw-Hill Publishing Co.
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Textbook Question
Chapter 55, Problem 1PL
The enzyme amylase accelerate s the reaction of changing
a. polysaccharides into monosaccharides.
b. disaccharides into monosaccharides.
c. starch into disaccharides.
d. disaccharides into glucose.
Expert Solution & Answer
Summary Introduction
Introduction:
Enzymes are biological catalysts that modify or speed up a specific chemical reaction. Digestion also involves many enzymatic reactions. One such reaction occurring during digestion of carbohydrate, involves the enzyme salivary amylase. Salivary amylase is secreted in the mouth and it accelerates the conversion of polysaccharides (starch) into disaccharides (sugar).
Answer to Problem 1PL
Correct answer:
The correct answer is option (c) starch into disaccharides.
Explanation of Solution
Explanation/justification for the correct answer:
Option (c) starch into disaccharides is the correct answer. Salivary amylase is a digestive enzyme that acts on starch which is a complex carbohydrate and hydrolyzes it into sugar which is a disaccharide. So, the correct answer is option (c).
Explanation for incorrect answer:
Option (a) polysaccharides into monosaccharides. Polysaccharides are first converted into disaccharides by amylase and then into monosaccharides by an intestinal enzyme called maltase. Amylase enzyme does not change polysaccharides directly into monosaccharides. So, this is an incorrect option.
Option (b) disaccharides into monosaccharides.Amylase enzyme accelerates conversion of polysaccharides into disaccharides and not disaccharides into monosaccharides. Disaccharides are changed into monosaccharides by an intestinal enzyme called maltase. So, this is an incorrect answer.
Option (d) disaccharides into glucose.Disaccharides are changed into glucose which is a monosaccharide by intestinal enzyme called maltase and not by amylase. So, this is an incorrect answer.
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Chapter 55 Solutions
Laboratory Manual For Human Anatomy & Physiology
Ch. 55 - The enzyme amylase accelerate s the reaction of...Ch. 55 - Amylase originates from a. salivary glands and...Ch. 55 - The optimum pH for amylase activity is a. 014 . b....Ch. 55 - After an enzyme reaction is completed, the enzyme...Ch. 55 - As temperatures decrease, enzyme activity a....Ch. 55 - Prob. 6PLCh. 55 - The change of the unique three-dimensional shape...Ch. 55 - Test results:Ch. 55 - Test results:
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