Test: GRE Subject Test: Biology

1.

Which of the following is true about the effects of epigenetics on gene expression? 

Modification of histone lysine residues alters gene expression by changing the affinity between DNA and histones

Modification of chromatin lysine residues alters gene expression by changing the affinity between DNA and chromatin

Modification of nucleosome lysine residues alters gene expression by changing the affinity between DNA and histones

Modification of histone arginine residues alters gene expression by changing the affinity between DNA and histones

None of the other answers 

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