Ncert Exercises & Solutions

Q. 9. In a nucleus, the number of ribonucleoside triphosphates is 10 ties the number of deoxy x 10 ribonucleoside triphosphates, but only deoxyribonucleotides are added during the DNA replication. Suggest a mechanism.

DNA polymerase enzyme is highly specific to recognize only deoxyribonucleoside triphosphates. Therefore, it cannot hold RNA

β

-nucleotides.

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