Eukaryotic flagella

Definition

Eukaryotic flagella are long, whip-like organelles that protrude from the cell body of certain eukaryotic cells and are used for locomotion. They are composed of microtubules arranged in a '9+2' structure and powered by dynein motor proteins.

5 Must Know Facts For Your Next Test

1. Eukaryotic flagella have a '9+2' arrangement of microtubules, meaning nine doublets surround two central microtubules.
2. The movement of eukaryotic flagella is driven by the motor protein dynein, which causes bending through ATP hydrolysis.
3. Unlike prokaryotic flagella, eukaryotic flagella are covered by the cell's plasma membrane.
4. Flagella can be found in various types of eukaryotic cells including certain protozoa and sperm cells.
5. The basal body anchors the eukaryotic flagellum to the cell and coordinates its assembly and function.

Review Questions

Related terms

Microtubules:

Cylindrical structures made of tubulin proteins that form part of the cytoskeleton.

Dynein: A motor protein that moves along microtubules and powers the movement of cilia and flagella.

Basal Body: A structure similar to a centriole from which a eukaryotic cilium or flagellum arises.