What is the main function of a centrosome in a cell?

The main function of a centrosome in a cell is to organize microtubules. Centrosomes are key components of the cell's cytoskeleton and play a crucial role in cell division and maintaining the overall structure of the cell. They consist of a pair of centrioles surrounded by a matrix of proteins, which facilitates the assembly of microtubules from tubulin proteins. This organization is essential for forming the mitotic spindle during mitosis, ensuring proper chromosome alignment and separation. The centrosome thus acts as a microtubule-organizing center that influences the cell's shape and function in various cellular processes.