KEISHOTSUKIHINAIN KEISHOTSUKIHINAIN Biology Answered 12. What is a centrosome? a. A type of cell that is made up entirely of centrioles. b. An organelle made up of two centrioles and microtubules c. An organelle made up of nine doublets of microtubules, involved in cell movement. d. An organelle made of a matrix of proteins involved in producing cellular energy.