What was formed at a convergent boundary of a continental plate and an ocean plate

When continental and oceanic plates collide, the thinner and more dense oceanic plate is overridden by the thicker and less dense continental plate. The oceanic plate is forced down into the mantle in a process known as "subduction." As the oceanic plate descends, it is forced into higher temperature environments.

hope this helps you :)!

The two roles that DNA polymerase has in DNA replication are: it breaks down long chains of polymers into amino acids and it is an enzyme, as most biochemical reactions do about enzymes, that is responsible for duplicating copies of DNA in the form of nucleic acid molecules.