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DnaDNA contain negative charge because the presence of phosphate group. Generally, hydrogen is not shown in DNA structure.

DNA

There are 3 hydrogens in phosphoric acid, each of them leaves as:

1 H joins with 3' -OH of previous nucleotide to form H2O$\ce{H2O}$ during DNA replication. 
1 OH joins with H of next nucleotide to form H2O$\ce{H2O}$ during DNA replication. 
1 H is released as H+$\ce{H+}$ (remember it was phosphoric acid), hence giving rise to the acidic character of DNA (remember it is DeoxyriboNucleic AciddeoxyriboNucleic acid).

Dna contain negative charge because the presence of phosphate group. Generally hydrogen is not shown in DNA structure.

DNA

There are 3 hydrogens in phosphoric acid, each of them leaves as:

1 H joins with 3' -OH of previous nucleotide to form H2O during DNA replication. 1 OH joins with H of next nucleotide to form H2O during DNA replication. 1 H is released as H+ (remember it was phosphoric acid), hence giving rise to the acidic character of DNA (remember it is DeoxyriboNucleic Acid).

DNA contain negative charge because the presence of phosphate group. Generally, hydrogen is not shown in DNA structure.

DNA

There are 3 hydrogens in phosphoric acid, each of them leaves as:

1 H joins with 3' -OH of previous nucleotide to form $\ce{H2O}$ during DNA replication. 
1 OH joins with H of next nucleotide to form $\ce{H2O}$ during DNA replication. 
1 H is released as $\ce{H+}$ (remember it was phosphoric acid), hence giving rise to the acidic character of DNA (remember it is deoxyriboNucleic acid).

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Dna contain negative charge because the presence of phosphate group. Generally hydrogen is not shown in DNA structure.

DNA

There are 3 hydrogens in phosphoric acid, each of them leaves as:

1 H joins with 3' -OH of previous nucleotide to form H2O during DNA replication. 1 OH joins with H of next nucleotide to form H2O during DNA replication. 1 H is released as H+ (remember it was phosphoric acid), hence giving rise to the acidic character of DNA (remember it is DeoxyriboNucleic Acid).