The net electric charge on DNA and histones is

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zero

negative and positive, respectively

negative

positive

answer is C.

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Detailed Solution

The net electric charge on DNA and histones is negative and positive, respectively. DNA consists of a nitrogenous base, pentose sugar and a phosphate group. DNA has negative charge due to the presence of phosphate group (PO₄^3-). Histones are rich in basic amino acid residues lysine and arginine, which carry positive charge in their side chains. Therefore, histones are positively charged.

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