Telomeres are the tiny areas at the tip of chromosomes that grow shorter each time a cell divides and eventually disappear ending cell replication. Telomeres functions to protect the ends of chromosomes from sticking to each other. Additionally they protect genetic information during cell division because a short piece of each chromosome is lost every time DNA is replicated.
The thylakoids contain two photosystems. They are the site of light-dependent reactions and are a <span>membrane-bound compartment inside chloroplasts and cyanobacteria.</span>
