Which of the following structures, found external to the bacterial cell wall, are involved in bacterial attachment to cell surfaces?
Correct answer: C. Pili
- A. Capsule
- B. Flagella
- C. Pili
- D. Mesosomes
Explanation
Pili, especially fimbriae, contain adhesins that bind specific receptors on host or other cell surfaces. Flagella mainly provide motility, whereas capsules primarily protect against phagocytosis.
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