What is the role of microfilaments in cytokinesis?

1 Answer
Jan 3, 2017

Help the cell move and divide.


From the Holt McDougal Biology Textbook
Chapter 3: Cell Structure and Function
thank you Holt McDougal!

Each eukaryotic cell has a cytoskeleton, which is a network of proteins that is constantly changing to meet the needs of a cell. It is made of small protein subunits that form long threads, or fibers, that crisscross the entire cell. Three main types of fibers make up the cytoskeleton and allow it to serve a wide range of functions.

• Microtubules are long hollow tubes. They give the cell its shape and act as “tracks” for the movement of organelles. When cells divide, microtubules form fibers that pull half of the DNA into each new cell.

• Intermediate filaments, which are somewhat smaller than microtubules, give a cell its strength.

• Microfilaments, the smallest of the three, are tiny threads that enable cells to move and divide. They play an important role in muscle cells, where they help the muscle contract and relax.