Polysaccharides such as starch, cellulose and glycogen are all composed of?

sucrose

glucose

fructose

Poly-saccharines such as starch, cellulose and glycogen are all composed of glucose.

Explanation:    

Polysaccharides are made of simple sugars like glucose called  Monosaccharide’s . The smaller sugar are binded together by  glycosidic bonds  with the help of special enzymes creating a polysaccharides  which is also called as glycan. Starch is polysaccharides formed by connecting glucose monomers of glucose together and is prepared from the excess of glucose produced in green plants during photosynthesis process.

Cellulose is the common materials that line along the cell wall of the pant which comprises of  more than 3000 glucose units. The glycogen is the predominant form storage of glucose and carbohydrates in animals and humans. The glycogen is formed from the glucose in the food that the humans and animals consume.

layer 3 is younger than layer 6.