Types of carbohydrates
Carbohydrates are organic molecules composed of carbon, oxygen and hydrogen.
There are three common types of carbohydrate:
Monosaccharides are the simplest carbohydrates. They are sugars.
Monosaccharides are small, water-soluble molecules . They are the building blocks (monomers) for larger carbohydrates.
Glucose, fructose and galactose are common monosaccharides.
Disaccharides are formed from two monosaccharides . They are also sugars.
Sucrose, lactose and maltose are common disaccharides.
Polysaccharides are long chains of monosaccharides . They are not sugars.
Polysaccharides are insoluble in water. The structure of polysaccharides can vary:
Cellulose is a polysaccharide which forms long, straight chains. Starch is a polysaccharide that forms coiled structures. Both are polymers of glucose!