Textbook Question
Give the name of one or more polysaccharides that matches each of the following descriptions:
b. contains only ß(1→4)-glycosidic bonds
Ch.13 Carbohydrates
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353
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Table of contents
- Ch.1 Chemistry in Our Lives11
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy54
- Ch.4 Atoms and Elements51
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions41
- Ch.8 Gases29
- Ch.9 Solutions51
- Ch.10 Acids and Bases and Equilibrium65
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons78
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones83
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides90
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis83
- Ch.18 Metabolic Pathways and ATP Production67
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353Not the one you use?Change textbook
Chapter 13, Problem 55b
Isomaltose, obtained from the breakdown of starch, has the following Haworth structure:
b. What are the monosaccharides in isomaltose?
Verified step by step guidance1
Identify the structure of isomaltose: Isomaltose is a disaccharide, meaning it is composed of two monosaccharide units linked together by a glycosidic bond. The Haworth structure provided will help determine the specific monosaccharides.
Examine the glycosidic bond: Look at the oxygen bridge connecting the two monosaccharides in the Haworth structure. This bond will indicate the type of linkage (e.g., α-1,6 or α-1,4) and the orientation of the monosaccharides.
Determine the first monosaccharide: Analyze the left-hand ring in the Haworth structure. Count the number of carbons and identify the functional groups (e.g., hydroxyl groups and anomeric carbon) to determine whether it is glucose, galactose, or another monosaccharide.
Determine the second monosaccharide: Similarly, analyze the right-hand ring in the Haworth structure. Use the same approach to identify the second monosaccharide.
Conclude the monosaccharides: Based on the analysis of both rings, conclude that isomaltose is composed of two glucose units (glucose + glucose) linked by an α-1,6-glycosidic bond.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Monosaccharides
Monosaccharides are the simplest form of carbohydrates, consisting of single sugar molecules. They serve as the building blocks for more complex carbohydrates. Common examples include glucose, fructose, and galactose. In the context of isomaltose, identifying the specific monosaccharides that compose it is essential for understanding its structure and function.
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Reduction of Monosaccharides Example 1
Disaccharides
Disaccharides are carbohydrates formed by the condensation of two monosaccharides, linked by a glycosidic bond. Isomaltose is a disaccharide derived from starch, specifically composed of two glucose units. Understanding the formation and properties of disaccharides is crucial for analyzing their role in biological systems and their nutritional significance.
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Haworth Structure
The Haworth structure is a way of representing the cyclic form of monosaccharides and disaccharides in a two-dimensional format. This representation helps visualize the arrangement of atoms and the orientation of functional groups in sugar molecules. Recognizing the Haworth structure of isomaltose is important for identifying its monosaccharide components and understanding its chemical behavior.
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Related Practice
Textbook Question
Give the name of one or more polysaccharides that matches each of the following descriptions:
d. produces maltose during digestion
Textbook Question
Isomaltose, obtained from the breakdown of starch, has the following Haworth structure:
a. Is isomaltose a mono-, di-, or polysaccharide?
Textbook Question
Isomaltose, obtained from the breakdown of starch, has the following Haworth structure:
d. Is this the α or β isomer of isomaltose?
Textbook Question
Melezitose, a carbohydrate secreted by insects, has the following Haworth structure:
a. Is melezitose a mono-, di-, or trisaccharide?
Textbook Question
Melezitose, a carbohydrate secreted by insects, has the following Haworth structure:
b. What monosaccharides are present in melezitose?