Assertion : The fimbriae are elongated tubular structures made of a special protein.
Reason : The pili are small bristle like fibres sprouting out of the cell.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

D

Explanation

Pili and fimbriae are surface structures of the bacteria but do not play a role in motility. The pili are elongated tubular structures made of a special protein (pilin). Pili develop in response to `F^(+)` or fertility factor in Gram negative bacteria. The fimbriae are small bristle-like fibres sprounting out of the cell. Fimbriae are involved in attaching bacteria to solid surfaces or host tissues.