-Composed of the protein tubulin, which consists of a dimercomposed of two protein subunits.
-Microtubules are long, hollow cylinders ~ 25 nm in diameter
-Involved in the movement of organelles, chromosomes, nuclei,and Golgi vesicle containing cell wall precursor
-Assist in the movement of chromosomes during mitosis and meiosis
-The destruction of cytoplasmic microtubules interferes with the transport of secretory materials to the cell periphery, which may inhibit cell wall synthesis