Final answer:
The structural formula of glucose can be shown in two ways: linear and cyclic forms.
Step-by-step explanation:
In the case of glucose, the structural formula can be shown in two ways: linear and cyclic forms. The linear form represents the sequential arrangement of atoms and bonds and can be depicted using a structural formula, which shows all the carbon and hydrogen atoms and their connecting bonds. The cyclic form shows the ring structure that glucose adopts in solution and can be shown using a Haworth projection, which simplifies the structure to a planar hexagon with a darkened edge representing the side facing the viewer.