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The sites of the histone modifications occur on the _______ part of the histone proteins because...

The sites of the histone modifications occur on the _______ part of the histone proteins because _____ and thereforce the modifications can be recognized by the proteins that might alter chromatin

A. Alpha helicies/these regions are extended away from the nucleosome
B. Alpha helicies/ these regions are buried in the interior of the nuclueosome

C. Amino terminal/ these regions are buried in the interior of the nuclueosome
D. Amino terminal/ these regions are extended away from the nucleosome

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The answer is D- The sites of the histone modifications occur on the Amino-terminal part of the histone proteins because these regions are extended away from the nucleosome and therefore the modifications can be recognized by the proteins that might alter chromatin

Each histone protein which makes the nucleosome core contain a flexible N terminal (amino terminal of 11-37 residues). This amino-terminal extends from the fixed structure of the nucleosome. Histone modifications like acetylation, methylation, phosphorylation occur on the amino acids of amino-terminal and this modification recognized by a protein that alters chromatin and impact gene expression.

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