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In the double helix structure of DNA , the bonds between bases on two strands joined by

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coordinate covalent bond

covalent bond

hydrogen bond

London forces

answer is B.

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Detailed Solution

In double helix DNA, the two strands are combined through the hydrogen bonding which takes place between nitrogenous bases. Two hydrogen bonding forms between Adenine and Thymine, and three H bonding between Guanine and Cytosine.

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