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(B) The bacterial flagellum is composed of three main parts: the filament,the hook,and the basal body.$1$. The filament is the longest portion and ext

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Flagella

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(B) The bacterial flagellum is composed of three main parts: the filament,the hook,and the basal body.$1$. The filament is the longest portion and extends from the cell surface to the outside.$2$. The hook connects the filament to the basal body.$3$. The basal body is a motor-like structure embedded in the cell envelope that anchors the flagellum and provides the rotational force.Therefore,these three components are characteristic parts of the bacterial flagella.

Column $I$ (Filament)	Column $II$ (Structure $\&$ Function)
$(a)$ Microfilaments	$(i)$ Strong and fibrous proteins; provide support to filaments and tubules
$(b)$ Microtubules	$(ii)$ Actin proteins; responsible for cytoplasmic streaming
$(c)$ Intermediate filaments	$(iii)$ Globular tubulin proteins; responsible for chromosome movement

The filament,hook,and basal body are parts of $.........$.

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