Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Flagella Orientation
Name: Tyler
Status: student
Age: 15
Location: N/A
Country: N/A
Date: 11/24/2003

Were is the location of a flagella in a cell?

A flagellum (singular) is like a tail: it is a cell-organelle that is attached in the cell membrane, facing outwards. In most flagellate bacteria and single-cellular eukaryotes, one or more flagella are visible by microscopy as tail-like structures. In some bacteria (particular spirochetes) flagella lay as a network between the inner and outer membrane, so that they are not visible from the outside. They presumably keep the bacteria in their typical spiral shape. In other bacteria a bunch of flagella are present at the tip of the cell, like a witch broom. In others, only a single flagellum is present. But always one end of the flagellum is attached to the membrane, through a motor which makes it rotate, and the other end is free.

Trudy Wassenaar

Click here to return to the Zoology Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory