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22 February, 04:31

In the DNA double helix how are the two strands of DNA held together

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  1. 22 February, 04:58
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    H bonding between the nitrogen bases of the two strands

    Explanation:

    There are two types of nitrogen bases found in DNA: purines and pyrimidines.

    Purines are Adenine and Guanine.

    Pyrimidines are Thyamine and Cytosine.

    Adenine of one strand bonds with Thyamine of other strand by 2 hydrogen bonds. Likewise, guanine and cytosine of opposite strands bind by 3 hydrogen bonds. In this way two strands of DNA are held together.
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