Answer:
A. Polymerase
Step-by-step explanation:
Polymerase is an enzyme that is used to assemble DNA and RNA molecules. It helps in the joining of smaller molecules to form a larger molecule.For example, DNA polymerase functions by copying a DNA template strand using base-pairing interactions or RNA by half ladder replication.
In DNA replication, Polymerase acts like a glue and rejoins the nucleotides.