The length of a DNA molecule is much greater | vedclass

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(B) In eukaryotic cells,the $DNA$ molecule is extremely long. For example,in humans,the total length of $DNA$ is approximately $2.2 \ m$,while the dia

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By super-coiling into nucleosomes

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(B) In eukaryotic cells,the $DNA$ molecule is extremely long. For example,in humans,the total length of $DNA$ is approximately $2.2 \ m$,while the diameter of the nucleus is only about $10^{-6} \ m$. To fit this long $DNA$ into the small nucleus,it undergoes a complex packaging process. The $DNA$ is negatively charged and wraps around positively charged histone protein octamers to form structures called nucleosomes. These nucleosomes further coil and condense into chromatin fibers,a process known as super-coiling,which allows the $DNA$ to be compactly organized within the nucleus.

The length of a $DNA$ molecule is much greater than the diameter of the nucleus in a eukaryotic cell. How is $DNA$ packaged?

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