The diameter of each nucleosome is about:

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(B) nucleosome is the fundamental unit of $DNA$ packaging in eukaryotes,consisting of a segment of $DNA$ wound around a histone protein core. The hist

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$110 \ \mathring{A}$

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(B) nucleosome is the fundamental unit of $DNA$ packaging in eukaryotes,consisting of a segment of $DNA$ wound around a histone protein core. The histone octamer core is composed of two copies each of histones $H2A$,$H2B$,$H3$,and $H4$. The $DNA$ wraps around this core approximately $1.65$ times. The diameter of the nucleosome particle is approximately $110 \ \mathring{A}$ $(11 \ nm)$. Therefore,the correct option is $B$.

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