Read the given passage and answer the questions that follow :-
In prokaryotes such as E. coli ,though they do not have a defined nucleus the DNA is not scattered throughout the cell. The DNA is held with some proteins in a specific region. in eukaryotes this organisation is much more complex .There is a set of positively charged basic proteins called histones. Histones are organised to form a unit of 8 molecules called histone octamer. The negatively charged DNA is wrapped around the positively charged histone octamer.

What is the structure formed by the wrapping of negatively charged DNA around positively charged histone octamer called?

Nucleosome 

The structure formed by the wrapping of negatively charged DNA around positively charged histone octamer is called a Nucleosome.

Nucleosomes are the basic repeating units of chromatin, composed of DNA wrapped around a core of eight histone proteins (two copies each of histones H2A, H2B, H3, and H4). These structures play a crucial role in compacting DNA to fit within the nucleus of a cell and also regulate access to the genetic information encoded in the DNA. Multiple nucleosomes connected by linker DNA form chromatin, which, in turn, further organizes into higher-order structures to eventually create chromosomes during cell division.