Bacterial Flagella

If Bacterial Flagella is a tree, Basal Body is its root which affix them to Bacterial cell wall.

In gram positive, basal body is affixed to inner membrane, spans the peptidoglycan layer and gives rise to flagella

In gram negative, basal body is affixed to inner membrane, spans the peptidoglycan layer, is affixed again to outer membrane and gives rise to flagella.

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• Vibrio cholera has a single polar flagella
• Escherichia coli has peritrichous flagella (Small flagella all around the body.)
• Spirochaets have periplasmic flagella. See Periplasmic flagella