Multiple choice

Bacteria conjugative pili are absent in

  1. Rickettsia felis

  2. Bacillus subtilis

  3. E. coli

  4. Brevibacterium mcbrellneri
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bacillus subtilis is a Gram-positive bacillus and pili are absent in Gram-positive bacteria. They possess pili-like proteins or Type 4 pilins which assemble into pili (long polymeric fibers that function in bacterial adhesion and motility).

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