RNA polymerase has a higher error rate (one mutation for every 1 million nucleotides incorporated)than DNA polymerase because RNA polymerase does not have exonuclease proofreading activity but DNA polymerase does.

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RNA polymerase does not have exonuclease proofreading activity, whereas DNA polymerase has proofreading activity that enables it to correct errors during DNA replication. Because RNA polymerase does not have this proofreading ability, it has a higher error rate compared to DNA polymerase.

RNA Polymerase Has a Higher Error Rate (One Mutation for Every