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In a nucleus, the number of RNA nucleosi...

In a nucleus, the number of RNA nucleoside triphosphates is 10 times more than the number of DNA nucleoside triphosphates, still only DNA nucleotides are added during the DNA replication, and not the RNAnucleotides. Why?

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DNA polymerase is highly specific to recognise only deoxyribonucleoside triphosphates. Therefore. It cannot hold RNA nucleotides.
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