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1. Why must DNA have thymine instead of Uracil? 2. Why is it necessary for RNA to have uracil instead of thymine?

1. Why must DNA have thymine instead of Uracil? 2. Why is it necessary for RNA to have uracil instead of thymine?
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1. Why must DNA have thymine instead of Uracil? 2. Why is it necessary for RNA to have uracil instead of thymine?

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User Bufferz
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Thymine has a methyl group and is better suited for the storage property of the DNA molecule as it is far more stable compared to Uracil.
RNA contain Uracil instead of thymine so as to make differentiation of RNA molecule from DNA molecules easier.
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User Iskren
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