[Campbell Biology P.625] According to the provided text, what is the primary functional diff... | Practice Question

According to the provided text, what is the primary functional difference between fimbriae and pili in prokaryotes?

  • A: Fimbriae are primarily for attachment to surfaces or other cells, while pili are mainly involved in pulling cells together for DNA transfer.
  • B: Both fimbriae and pili are primarily involved in prokaryotic motility, but pili are longer.
  • C: Fimbriae facilitate nutrient uptake, while pili are involved in waste expulsion.
  • D: Pili are typically shorter and more numerous than fimbriae, and both are for DNA transfer.

Explanation

The text states: 'Fimbriae ... enable some prokaryotes to attach to surfaces or to other cells.' and 'Pili ... are appendages that pull two cells together prior to DNA transfer from one cell to the other.' Therefore, fimbriae are for attachment, and pili are for DNA transfer.