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A-Level Biology OCR A

Molecular Motor Outline Structure Function Prokaryotic Flagellum Flagellum 

Prokaryotic flagella are thinner, lack a 9+2 arrangement, and use a rotating motor for movement, differing from eukaryotic flagella that whip.

Prokaryotic flagella are thinner than eukaryotic ones, lack the 9+2 arrangement, and rotate via a basal body and molecular motor for propulsion.

Front Outline the structure and function of a prokaryotic flagellum.
Back Flagellum 
  • Thinner than the equivalent of eukaryotes, no 9+2 arrangement
  • It is attached to the cell membrane by a basal body and rotated by a molecular motor
  • Molecular motor causes hook to rotate, creating true propeller motion

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