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Which of the following may contain fimbriae?

  • A.Gram-positive bacteria
  • B.Gram-negative bacteria
  • C.Both (a) and (b)
  • D.None of these

Answer: B

Correct answer: Gram-negative bacteria

Fimbriae are short hair-like appendages used for attachment, and they are characteristic of gram-negative bacteria, where they are anchored in the outer membrane. They are not organs of motility - that is the flagellum - but they are important in colonisation and virulence.

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