Now, let's move on to cellulose. Cellulose is actually one of the most common types of organic compounds on Earth, and cellulose is basically another very common type of polysaccharide that we'll find in plants. So cellulose, unlike starch and glycogen, plays a role in structure, and we'll see why that's the case. It has to do with the type of bonds that exist in cellulose. So we saw that in glycogen, as well as starch, we have these bonds we call the alpha one four glycocitic bonds. And we said that these alpha one four glycocitic bonds create a helical structure, and the helical structure is perfect to store it as energy.