Click Here to return to the search form. I have a question for you. I read that brain cells do not replicate, but some brain stem cells are replicating. If mitochondria divide each time the brain cells divide, does this mean that only then we can have new cells? I have read that they also replicate at random at any time of the cell cycle. My question is also: if the brain mitochondria are different than the skin mitochondria because they must last much more time, does skin mitochondria last as long as brain cells? Than you very much for your site.I will be happy to hear your answer. Question Date: 0000-00-00 Copyright © 2020 The Regents of the University of California, All Rights Reserved. UCSB Terms of Use