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b. Identify the glycosidic linkage that connects the sugars.
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Ch. 20 - The Organic Chemistry of Carbohydrates
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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TOC.tableOfContents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding31
- Ch. 2 - Acids and Bases: Central to Understanding Organic Chemistry84
- Ch. 3 - An Introduction to Organic Compounds: Nomenclature, Physical Properties, and Structure183
- Ch. 4 - Isomers: The Arrangement of Atoms in Space121
- Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics83
- Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions175
- Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis119
- Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene148
- Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides212
- Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds131
- Ch. 11 - Organometallic Compounds60
- Ch. 12 - Radicals90
- Ch. 13 - Mass Spectrometry; Infrared Spectroscopy; UV/Vis Spectroscopy62
- Ch. 14 - NMR Spectroscopy95
- Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives123
- Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives141
- Ch. 17 - Reactions at the Alpha-Carbon101
- Ch. 18 - Reactions of Benzene and Substituted Benzenes144
- Ch. 19 - More About Amines • Reactions of Heterocyclic Compounds49
- Ch. 20 - The Organic Chemistry of Carbohydrates80
- Ch. 21 - Amino Acids, Peptides, and Proteins57
- Ch. 22 - Catalysis in Organic Reactions and in Enzymatic Reactions35
- Ch. 23 - The Organic Chemistry of the Coenzymes—Compounds Derived from Vitamins1
- Ch. 28 - Pericyclic Reactions58
Capitolo 20, Problema 31c
What is the main structural difference between c. amylopectin and glycogen?
Guida verificata passo dopo passo1
Amylopectin and glycogen are both branched polysaccharides, but the main structural difference lies in the degree of branching. Amylopectin has branches approximately every 24-30 glucose units, while glycogen has branches more frequently, approximately every 8-12 glucose units. This makes glycogen more compact and highly branched compared to amylopectin.
Cellulose and chitin are both linear polysaccharides, but the main structural difference is in the monomer units and the functional groups attached. Cellulose is composed of β-D-glucose monomers linked by β(1→4) glycosidic bonds, while chitin is composed of N-acetylglucosamine (a derivative of glucose) monomers linked by β(1→4) glycosidic bonds.
In cellulose, the hydroxyl groups (-OH) on the glucose monomers allow for extensive hydrogen bonding between adjacent chains, giving cellulose its high tensile strength and rigidity.
In chitin, the presence of the N-acetyl group (-NHCOCH₃) on the glucose derivative provides additional hydrogen bonding opportunities, making chitin structurally similar to cellulose but with slightly different properties, such as increased rigidity and resistance to degradation.
To summarize, the key differences are the branching frequency in amylopectin versus glycogen, and the monomer composition (glucose vs. N-acetylglucosamine) and functional groups in cellulose versus chitin.
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Amylopectin vs. Glycogen
Amylopectin and glycogen are both polysaccharides composed of glucose units, but they differ in structure and function. Amylopectin, found in plants, has a branched structure with fewer branches compared to glycogen, which is highly branched and serves as a primary energy storage molecule in animals. The branching in glycogen allows for rapid mobilization of glucose when energy is needed.
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1,2 vs. 1,4 products
Cellulose vs. Chitin
Cellulose and chitin are both structural polysaccharides, but they are composed of different monomers and serve different organisms. Cellulose is made of β-glucose units and is a key component of plant cell walls, providing rigidity. In contrast, chitin is composed of N-acetylglucosamine units and is found in the exoskeletons of arthropods and the cell walls of fungi, offering strength and protection.
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03:061,2 vs. 1,4 products
Polysaccharide Structure and Function
Polysaccharides are long chains of monosaccharides linked by glycosidic bonds, and their structure directly influences their function. The arrangement of these sugar units, including branching and types of glycosidic linkages, determines whether a polysaccharide serves as an energy storage molecule or a structural component. Understanding these structural differences is crucial for distinguishing between various polysaccharides like amylopectin, glycogen, cellulose, and chitin.
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11:53Polysaccharide
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