What do polysaccharides, such as cellulose, nucleic acids, such as DNA, and proteins, such as keratin, have in common?
They are all biomolecules.
Cellulose, a polysaccharide ( poly meaning many, and saccharide referring to sugar), is classified as a carbohydrate. It is found in the cell wall of plants. Nucleic acids are molecules found in the nucleus and help with genetic material, like what DNA does for us. Keratin is a protein associated with structure, and is found in our hair and nails.