Which of the following does not describe a correct function of DNA polymerase?

It helps to replace RNA primers with DNA nucleotides.

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It adds complementary DNA base pairs in a 5 to 3 direction along the DNA leading and lagging strands.

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It proofreads the replicated DNA and replaces mismatched DNA nucleotides.

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It adds RNA nucleotides along the DNA template in transcription.

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Solution

The correct option is D It adds RNA nucleotides along the DNA template in transcription.
DNA polymerase is an enzyme used in the replication of DNA. It ads the DNA primers to the parent chain. This enzyme acts in the 5'-3 direction and thus forms lading stand on the chain that has 3'5' direction.
There are 3 DNA polymerases in use from which only the DNA polymerase II helps in replication and rest of the two are used in the DNA proofreading.

So, the correct option is 'It adds RNA nucleotides along the DNA template in transcription.'

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DNA polymerase adds nucleotides to the free ___ end of RNA primers.

Q. Identify the statement(s) about RNA polymerases.
I. separates the two strands of DNA apart
II. add RNA nucleotides together
III. bind to promoter regions of the DNA to begin transcription

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