Which structure is a long, whip-like filament that helps in cell motility?

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Multiple Choice

Which structure is a long, whip-like filament that helps in cell motility?

Explanation:
Motility in many cells is driven by a long, whip-like filament that rotates to propel the cell forward. This structure, called a flagellum, acts like a tiny propeller and is powered by a motor in the cell membrane using an ion gradient to generate movement. This is distinct from the other structures: an endospore is a dormant, resistant form formed for survival; a capsule is an outside protective layer that helps with protection and adhesion; and pili are short hair-like fibers used mainly for attachment or genetic exchange, not for sustained locomotion. So the long, whip-like filament responsible for movement is the flagellum.

Motility in many cells is driven by a long, whip-like filament that rotates to propel the cell forward. This structure, called a flagellum, acts like a tiny propeller and is powered by a motor in the cell membrane using an ion gradient to generate movement. This is distinct from the other structures: an endospore is a dormant, resistant form formed for survival; a capsule is an outside protective layer that helps with protection and adhesion; and pili are short hair-like fibers used mainly for attachment or genetic exchange, not for sustained locomotion. So the long, whip-like filament responsible for movement is the flagellum.

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