Q. 5. The net electric charge on DNA and histones is
(a) both positive
(b) both negative
(c) Both (a) and (b)
(d) zero
(c) DNA consists of a nitrogenous base, pentose sugar and a phosphate group. DNA has a negative charge due to the presence of the phosphate group .
Histones are rich in the basic amino acid residues lysines and arginines, which carry positive charges in their side chains. Therefore, histones are positively charged.
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