what does fimbriae and the cell wall have in common?

Question

microbiology

Answer 1

In bacteriology, fimbria is a proteinaceous appendage in many gram-negative bacteria that is thinner and shorter than a flagellum. This appendage ranges from 3-10 nanometers in diameter and can be up to several micrometers long. Fimbriae are used by bacteria to adhere to one another during mating and to adhere to animal cells. A bacterium can have as many as 1,000 fimbriae. Fimbriae are only visible with the use of an electron microscope.

what do they have in common,
bothe cell wall and fimbriae are non living structures,both are proteinaceous in nature,Fimbriae sometimes play a role in virulence, as do the cell walls of Gram-ve bacteria