pili and fimbriae ppt

1. What is the difference between fimbriae and pili?
2. What are the function of pili?
3. What are Fimbriae and what is their function?
4. What is the importance of Fimbriae?
5. Are pili used to transfer DNA?
6. What is the meaning of Fimbriae?
7. What is the difference between cilia and Pili?
8. Is Pili found in eukaryotic cells?
9. How are pili used to promote infection?
10. What is the structure of fimbriae?
11. Is Fallopian tube attached to ovary?

What is the difference between fimbriae and pili?

Fimbriae are bristle like short fibres occurs on the surface of bacteria. Pili are long hair like tubular microfibres like structures present on the surface of bacteria. Fimbriae are present on both Gram positive and Gram negative bacteria. Pili are present only on some Gram negative bacteria.

What are the function of pili?

Conjugative pili allow for the transfer of DNA between bacteria, in the process of bacterial conjugation. They are sometimes called "sex pili", in analogy to sexual reproduction, because they allow for the exchange of genes via the formation of "mating pairs".

What are Fimbriae and what is their function?

Fimbriae are used by bacteria to adhere to one another and to adhere to animal cells and some inanimate objects. A bacterium can have as many as 1,000 fimbriae. Fimbriae are only visible with the use of an electron microscope. They may be straight or flexible.

What is the importance of Fimbriae?

Fimbriae facilitate adherence and thus enhance the capacity of the organism to produce disease. E coli, P mirabilis, and other gram-negative bacteria contain fimbriae (ie, pili), which are tiny projections on the surface of the bacterium.

Are pili used to transfer DNA?

Conjugative pili allow the transfer of DNA between bacteria, in the process of bacterial conjugation. They are sometimes called “sex pili”, in analogy to sexual reproduction, because they allow for the exchange of genes via the formation of “mating pairs”.

What is the meaning of Fimbriae?

A fimbria (plural fimbriae, adjective fimbriate) is a Latin word that literally means "fringe." It is commonly used in science and medicine, with its meaning depending on the field of study or the context. ... Fimbria (female reproductive system), a fringe of tissue near the ovary leading to the fallopian tube.

What is the difference between cilia and Pili?

pili are special extension of bacterial cell which are made for conjugation in bacterial cell, whereas cilia do not perform this function. cilia and pili do provide some common benefits to the bacterial cell like to adhere to a surface, help in movement and gather food.

Is Pili found in eukaryotic cells?

Eukaryotic cells do not have a cell envelope, as both animal and plant cells lack pili and a capsule and plant cells do not have a cell wall. Prokaryotic cells lack most organelles, for example a mitochondrion, chloroplasts, and cilia.

How are pili used to promote infection?

The pili help the bacteria not get flushed by adhesion, and therefore stick to cells and infect. This causes illness due to pili helping bacteria bind to cells.

What is the structure of fimbriae?

Fimbriae are long filamentous polymeric protein structures located at the surface of bacterial cells. They enable the bacteria to bind to specific receptor structures and thereby to colonise specific surfaces.

Is Fallopian tube attached to ovary?

An ovary is not directly connected to its adjacent Fallopian tube. When ovulation is about to occur, the sex hormones activate the fimbriae, causing them to swell with blood and hit the ovary in a gentle, sweeping motion.