In what way do microtubules contribute to cell structure?

Microtubules play a crucial role in maintaining the structure of plant cells by being integral components of the cytoskeleton, which is a framework that supports the cell. In particular, they are involved in the organization of the plant cell's cytoplasm and contribute to the process of cell wall synthesis.

During cell division, microtubules help guide the movement of vesicles that carry cellulose synthase complexes to specific sites in the plasma membrane, where these proteins facilitate the incorporation of cellulose into the growing cell wall. This addition of cellulose is essential for providing structural integrity and support to the cell wall, which is critical for plant growth and rigidity.

This connection between microtubules and cellulose addition highlights their vital function in cell structure, particularly in the context of plants. Thus, the contribution of microtubules to controlling the addition of cellulose to the cell wall accurately reflects their role in ensuring that plant cells maintain their shape and respond to environmental pressures.