Which best describes step 3 in the diagram?
restriction enzymes cut the dna into fragments; the fragments join with the host dna to create recombinant dna.
recombinant dna is inserted into a biological vector; the vector houses the recombinant dna and is capable of creating copies of dna for itself and the recombinant dna.
cloning of the recombinant dna occurs; the dna is cloned in the biological vector to create more dna for use in the host.
recombinant dna is inserted into a mechanical vector; the mechanical vector allows the dna to be inserted into the dna clone for use in the host.