The prokaryotic flagella possess:
Correct answer: A. Helically arranged protein molecules
- A. Helically arranged protein molecules
- B. "9 + 2" membrane enclosed structure
- C. Unit membrane enclosed fibre
- D. Protein membrane enclosed fibre
Explanation
Prokaryotic flagellum is not surrounded by any membrane. It consists of a single thread. The thread is made of numerous identical spherical protein sub-units called, flagellin. Each subunit is about 40 Å in diameter. The flagellin subunits are arranged in helical spirals and form a hollow cylinder. Each flagellum is about 120-150 Å thick.
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