An example is starch, found in bread, which provides us with energy in the form of complex carbohydrates (if wholemeal). Plants also use it for long term storage.
- Proteins are the polysaccharides of amino acids, many amino acids form a protein.
Proteins are an essential nutrient for our bodies to maintain and develop muscles, so eating foods with proteins (eg: meat) is one way proteins can be used.
- Lipids are polysaccharides of fatty acids and glycerol. Lipids
#=#fat. Fat is a long term energy storage for humans.
Hope this is what you were looking for,