The telomeres are made of repeated sequences of DNA ('repetitive DNA'). During cell division, enzymes that duplicate DNA cannot continue their work all the way to the end of chromosomes. If cells divided without telomeres, they would lose the ends of their chromosomes, and the information they contain.
References[change | change source]
- Elizabeth Blackburn: AtGoogleTalks, August 20, 2008 Molecular biologist Elizabeth Blackburn