The sugar produced by photosynthesis can be converted into the sugar glucose. Thousands of glucose molecules can be linked together to form the complex carbohydrate cellulose. Cellulose is a very tough molecule that is used to build the cell wall of plant cells.
The plant then releases oxygen into the air. Glucose, which is actually a sugar, feeds the plant. There are many uses of glucose in plants. Glucose helps plants grow, form flowers and develop fruit. It also helps plants develop seeds.
