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In a nucleus, the number of ribonucleosi...

In a nucleus, the number of ribonucleoside triphophates is 10 times the number of deoxy `xx10` ribonucleoside triphosphaes, but only deoxy ribonucleotides are added during the DNA replication. Suggest a mechanism.

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DNA polymerase can identify only deoxyribonucleoside triphosphates and capable of incorporating them as deoxyribonucleotides.
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