NEET BIOLOGY

Detailed explanation-1: -Fimbriae are involved in attaching bacteria to solid surfaces (e.g., rock in water body) or host tissues (e.g., urinary tract in Neisseria gonorrhoeae). Some fimbriae cause agglutination of RBC. They also help in mutual clinging of bacteria.

Detailed explanation-2: -The structures that help some bacteria to attach to rocks and /or host tissues are fimbriae.

Detailed explanation-3: -Pili (Fimbriae): Pili are slender, hairlike, proteinaceous appendages on the surface of many (particularly Gram-negative) bacteria. They are important in adhesion to host surfaces.

Detailed explanation-4: -Gram-negative bacteria, as well as some Gram-positive bacteria, possess hair-like appendages known as fimbriae, which play an important role in adhesion of the bacteria to surfaces or to other bacteria.

Detailed explanation-5: -Assertion: Pili and fimbriae are known to help the bacteria to become motile in streams.