Q. Flagellum in which lateral appendages are present on the axoneme in two or more rows
Solution:
Flagella is an outgrowth of the cell membrane consists of microtubules as a structural component. The microtubule is composed of flagellin protein in protists while in case of eukaryotes it is made up of tubulin protein. The microtubule arranged in parallel to the long axis which forms axoneme, i.e. the central core of flagellum. Mastigoneme is hair like lateral structure that helps in locomotion by reversing the thrust caused when flagella beat. The types of flagella are based on the arrangements of mastigoneme on the flagellum.
- Stichonematic : Mastigonemes are in one row. e.g.Euglena
- Pantonematic: Mastigonemes are in two rows. e.g.-
- Acronematic: Flagellum has no mastigonemes; it ends with a fine filament. e.g. polytoma.
- Simple flagellum: This flagellum will not show mastigonemes or end in fibre. Ex: Dinoflagellates.
- Stichonematic : Mastigonemes are in one row. e.g.Euglena
- Pantonematic: Mastigonemes are in two rows. e.g.-
- Acronematic: Flagellum has no mastigonemes; it ends with a fine filament. e.g. polytoma.
- Simple flagellum: This flagellum will not show mastigonemes or end in fibre. Ex: Dinoflagellates.