What is the difference between a polysaccharide and a macromolecule? I'm having trouble understanding the difference between "Polysaccharide" and "Macromolecule". I know that polysaccharides are made of chains of monosaccharides. In addition, I know that macromolecules are made of monomers. But what is the difference?

A macromolecule is a class of biomolecules that are made of monomers. These include polysaccharides (i.e. sugars) polypeptides (i.e. proteins) nucleic acids (like DNA and RNA) and lipids (fats ans phospholipids).

A polysaccharide is one type of macromolecule made up of monosaccharides like glucose and fructose. An example of a polysaccharide is starch or cellulose.