Question

what is the mean of Pili

Answer 1

A pilus (Latin for 'hair'; plural : pili) is a hair-like appendage found on the surface of manybacteria.[1] The terms pilus and fimbria (Latin for 'fringe'; plural: fimbriae) can be used interchangeably, although some researchers reserve the term pilus for the appendage required for bacterial conjugation. All pili in the latter sense are primarily composed ofpilin proteins, which are oligomeric.

Dozens of these structures can exist on the bacteria. Some bacteria, viruses orbacteriophages attach to receptors on pili at the start of their reproductive cycle.

Pili are antigenic. They are also fragile and constantly replaced, sometimes with pili of different composition, resulting in altered antigenicity. Specific host responses to old pili structure are not effective on the new structure. Recombination genes of pili code for variable (V) and constant (C) regions of the pili (similar to immunoglobulin diversity).

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Answer 2

As-Salamu-Alykum


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Pilli are finger like projection or appendages on surface of bacteria .

These helps bacteria in transfer of DNA , conjugation


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INSHALLAH it will help U