Which chemical is an enzyme that adds nucleotides to a new strand of dna during replication

DNA polymerse

This is the answer

In the replication process, RNase H removes the RNA primer (created by primase) from the lagging strand and then polymerase I fills in the necessary nucleotides between the Okazaki fragments (see DNA replication) in a 5'→3' direction, proofreading for mistakes as it goes.