Question

Which type of arrangement of flagella is found in monera ?

Answer 1

Description:

Bacterial flagella are unistranded, equivalent to a single microtubular fibre. They are about 20nm in diameter and 1-7µm in length. Bacterial flagellum is made up of 3 parts - basal body, hook and filament.

Basal Body

1. They are rod like and inserted into the cell envelope.
2. Basal body bears ring like swellings in the region of plasma membrane and cell wall.
3. Gram negative have L and P ring in the cell wall and S and M ring embedded in the cell membrane while gram positive bacteria bears only a single pair of rings i.e. S and M ring embedded in the cell membrane.

Hook

1. Curved tubular structure which connects the filament with the basal body.
2. They are the thickest part of flagellum.

Filament

1. Long tubular structure.
2. Causes turbulence in liquid medium.
3. Made up of flagellin protein.