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Question : Histone proteins are

Answer»

basic , negatively charged
basic , positively charged
acidic, positively charged
acidic, negatively charged.

Solution :(B) : In eukaryotes, DNA organisation is complex. There is a set of positively CHANGED, basic porteins called histones. Histones are rich in the basic aminoacid RESIDUES lysine and arginine. There are five types of histone proteins-`H_(1),H_(2)A,H_(2)B, H_(3) and H_(4)`. Four of them`(H_(2)A, H_(2)B, H_(3) and H_(4))` produce histone octamer called nu body or core of nucleosome . The negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome. DNA connecting two adjacent nucleosomes is called linker DNA which BEARS `H_(1)` histone proteins.


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