Final answer:
Intermediate filaments are not hollow but are composed of fibrous subunits like keratin, contrary to hollow microtubules made of tubulin dimers.
Step-by-step explanation:
Intermediate filaments are not hollow tubular structures like microtubules, so the statement is False. Intermediate filaments are made up of long fibrous subunits, such as keratin, that are wound together, providing tensile strength to the cells. On the other hand, microtubules are indeed hollow structures composed of polymerized dimers of alpha-tubulin and beta-tubulin, forming hollow cylinders that are essential for cell shape, intracellular transport, and cell division mechanisms such as the formation of the mitotic spindle.