Question

When glucose molecules link up what substances do they form

Answer 1

When two glucose molecules come together, the two hydroxyl groups line up alongside each other: one combines with a hydrogen atom from the other to form water, in turn forming an oxygen bridge across the two molecules, bonding them and creating a disaccharide- this bond is called a glycosidic bond.

Answer 2

Glucose is what plants make to get there energy, also known as sugar. Hope this helps.