Nucleosomes? What is the meaning of nucleosomes? Its features? Functions! Where they are present?

Any of the repeating globular subunits of chromatin that consist of a complex of DNA and histone and are thought to be present only during interphase.
Nucleosomes form the fundamental repeating units of eukaryotic chromatin, which is used to pack the large eukaryotic genomes into the nucleus while still ensuring appropriate access to it (in mammalian cells approximately 2 m of linear DNA have to be packed into a nucleus of roughly 10 µm diameter).