In DNA replication, polymerases does what?

Hi, wynne!

If you read and study information on the following sites, I'm sure that you'll be able to figure it out.

DNA polymerase - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/DNA_polymerase)

DNA replication - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/DNA_replication)

DNA Replication (http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/D/DNAReplication.html)

Thanks!