Pili and fimbriae are cell surface appendages present in bacteria other than flagella. These structures are not for locomotion.
Pili and fimbriae are surface appendages for attachment.
Pili and fimbriae Pili vs Fimbriae
Pili
Fimbriae
Long, thicker, tubular structures made up of protein pilin
Thin and shorter than the pili
Pili are found only in Gram negative bacteria
Fimbriae are found both in Gram negative and Gram positive bacteria
The number of pili are less (3-5 per cell)
The number of fimbriae is 300-400 per cell
Formation of pili is governed by plasmid genes
Formation of fimbriae is governed by bacterial genes in the nucleoid region
Pili, involved in cell to cell attachment during bacterial conjugation. Therefore called as sex-pili
Fimbriae is involved in cell to surface attachment of bacteria

7 Comments

We Love to hear from U :) Leave us a Comment to improve this site
Thanks for Visiting.....

  1. Pili can be used for "twitching" locomotion.

    ReplyDelete
  2. Thanks. Really helpful!

    ReplyDelete
  3. Nice answer I really found it very helpful thanks

    ReplyDelete
  4. Enter your comment...thank u it really helped me

    ReplyDelete
  5. Can we call fimbrae as s pili

    ReplyDelete
    Replies
    1. no, both are different. Pili are the tubular structures whereas fimbriae are the small bristle like fibres sprouting out of the cell which helps in attachment

      Delete
  6. It becomes really helpful for me....thank u so much😊😊😊

    ReplyDelete

Post a Comment

We Love to hear from U :) Leave us a Comment to improve this site
Thanks for Visiting.....

Previous Post Next Post