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1 February, 21:29

In the dna double helix archaic pairs with thymine and cytosine pairs with guanine

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  1. 1 February, 23:30
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    False
  2. 2 February, 00:53
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    Adenine which is a purine base, always pairs with the pyrimidine Thymine in DNA and Uracil (also a pyrimidine) in RNA. The bond which is present between the two bases is a double hydrogen bond.

    Guanine which is also a purine base, always pairs with the pyrimidine Cytosine, in the case of both, DNA and RNA. The bond which is present between the two bases is a triple hydrogen bond and hence, is stronger than the A-G double bond.
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