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Biology

Answered

Explain why a purine base (Adenine & Guanine) must be paired with a pyrimidine base (Thymine &
Cytosine)

Answer :

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Because hydrogen bonds are not as strong as covalent bonds, base pairings can easily be separated, allowing for replication and transcription. Because purines always bind with pyrimidines – known as complementary pairing – the ratio of the two will always be constant within a DNA molecule.

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