What are histones? What are their functions?

(N/A) $\Rightarrow$ Histones are basic proteins rich in positively charged amino acids,specifically lysine and arginine.
$\Rightarrow$ They are found in the nuclei of eukaryotic cells and are responsible for the packaging of $DNA$ into structural units called nucleosomes.
$\Rightarrow$ Function: Histones possess positively charged ends that attract the negatively charged phosphate backbone of $DNA$,allowing the $DNA$ to wrap around the histone octamer.
$\Rightarrow$ This packaging is essential for condensing $DNA$ into chromatin,which helps in fitting the long $DNA$ molecules into the small volume of the nucleus and plays a crucial role in gene regulation.