Differentiate between the structure of flagella in bacteria and centriole

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Differences between the structure of flagella in bacteria and centriole.

Structure of cilia

These are hair-like outgrowths of the plasma membrane.They are covered by the plasma membrane. Axoneme forms core of the internal portions of the cilia. Axoneme contains microtubule which are 9 pairs of peripheral microtubules and one pair of central microtubules. This arrangement is called 9 + 2 array.

  • Central tubules − connected by bridges and enclosed within the central sheath

  • Radial spoke − connects one of the tubules of each of the nine peripheral microtubules with the central sheath

  • Linkers − interconnect the peripheral tubules

  • Basal body − centriole-like structure from where the cilia and the flagella emerge

Structure of centriole‚Äč
A centriole is made up of nine sets of peripheral fibrils of tubulin protein and no doublet in the center. . Also, each of the peripheral fibrils is a triplet.

  • Hub: Central part of the proximal region of the centriole

  • Radial spokes: Connect the hub with the tubules of the peripheral triplets

  • Importance of centriole: Forms the basal body of the cilia and the flagella, and the spindle fibre

Hope this information will clear your doubts about the cilia and centriole.

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Flagella are the means for a bacteria to move. Centrioles form spindle fibres during the mitosis and meiosis phase.
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