Polysaccharides: chemical nature of starch and glycogen

Polysaccharides are complex carbohydrates composed of multiple monosaccharide units linked together through glycosidic bonds. These macromolecules can vary in size and structure, ranging from a few hundred to thousands of monosaccharide residues. Common examples of polysaccharides include starch, glycogen, and cellulose. Polysaccharides serve various functions in living organisms, such as …

Disaccharides: structure of maltose, lactose, and sucrose

Disaccharides, a type of carbohydrate, consist of two monosaccharide units linked together by a glycosidic bond. Monosaccharides, the building blocks for disaccharides, undergo a condensation reaction to form a disaccharide, eliminating a water molecule as the two monosaccharide units join together. Maltose Maltose is a disaccharide, a type of carbohydrate …

Monosaccharides: Structure of glucose, fructose, and galactose

Monosaccharides are the simplest form of carbohydrates, often called single sugars. They are the basic building blocks of more complex carbohydrates. Monosaccharides consist of a single sugar unit and cannot be further hydrolyzed to simpler compounds. The most common monosaccharides include glucose, fructose, and galactose, each with a specific molecular …

Carbohydrates: Definition, Classification, chemical properties

Carbohydrates are organic compounds of carbon, hydrogen, and oxygen atoms, typically with a hydrogen-oxygen atom ratio of 2:1 (as in water). They serve as a primary energy source for living organisms and play essential structural and functional roles in cells. Carbohydrates include sugars, starches, and fibers and can be classified …

Biological role of carbohydrates

Carbohydrates play crucial biological roles in living organisms, serving as essential macromolecules with diverse functions. Some key biological roles of carbohydrates include: 1. Energy Source Glucose Metabolism: Carbohydrates, especially glucose, are a primary energy source for cellular processes through glycolysis and cellular respiration. Energy Storage: Excess glucose is converted into …

Qualitative tests for carbohydrates

Qualitative tests for carbohydrates involve detecting the presence of specific functional groups or characteristics indicative of different types of carbohydrates. Here are some common qualitative tests for carbohydrates: 1. Benedict’s Test (Reducing Sugars) Principle: Detects reducing sugars that can reduce copper ions (Cu²⁺) to form a colored precipitate. Procedure: Mix …

Chemical Nature of Glycogen

1. Composition Monomers: Glycogen is a polysaccharide composed of glucose monomers. Linkages: It consists of α-D-glucose units linked by α-1,4-glycosidic bonds (linear chains) and α-1,6-glycosidic bonds (branch points). 2. Structure Linear Chains: The main structure of glycogen consists of linear chains of glucose molecules linked by α-1,4-glycosidic bonds. Branching: Branch …

Chemical Nature of Starch

1. Composition Monomers: Starch is a polysaccharide composed of glucose monomers. Types: It consists of two glucose polymers: amylose and amylopectin. 2. Amylose Structure: Amylose is a linear chain of α-D-glucose molecules linked by α-1,4-glycosidic bonds. Properties: It forms a helical structure due to the arrangement of glucose units. Solubility: …

Polysaccharides – Definition, Classification

Polysaccharides are complex carbohydrates composed of multiple monosaccharide units linked together through glycosidic bonds. These macromolecules can vary in size and structure, ranging from a few hundred to thousands of monosaccharide residues. Common examples of polysaccharides include starch, glycogen, and cellulose. Polysaccharides serve various functions in living organisms, such as …

Sucrose – Definition, Structure

Sucrose, a disaccharide and a type of carbohydrate, comprises one molecule of glucose and one molecule of fructose linked together by an α,β-1,2-glycosidic bond. Sucrose, widely known as table sugar, is the most extensively consumed sugar by humans and is prevalent in many plants. In its crystalline form, sucrose is …

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