Where three groups of carbohydrates can be classified?

Carbohydrates can be classified into three main groups based on their structure and complexity:

1. **Monosaccharides**: These are the simplest form of carbohydrates, consisting of single sugar molecules. They cannot be hydrolyzed into smaller carbohydrate units. Common examples include glucose, fructose, and galactose. Monosaccharides are the building blocks for more complex carbohydrates.

2. **Disaccharides**: These consist of two monosaccharide molecules linked together by a glycosidic bond. Disaccharides can be hydrolyzed into their constituent monosaccharides. Common examples include sucrose (glucose + fructose), lactose (glucose + galactose), and maltose (glucose + glucose).

3. **Polysaccharides**: These are large, complex carbohydrates composed of long chains of monosaccharide units bonded together. Polysaccharides can be branched or unbranched and serve various functions, including energy storage and structural support. Common examples include starch (energy storage in plants), glycogen (energy storage in animals), and cellulose (a structural component in plant cell walls).

These three groups represent the broad classification of carbohydrates based on their molecular structure and complexity.