Final answer:
The bacterial DNA structure used in recombinant technology to make insulin and other desired proteins is the bacterial plasmid.
Step-by-step explanation:
The bacterial DNA structure used in recombinant technology to make insulin and other desired proteins is the bacterial plasmid. Recombinant DNA technology involves inserting the gene for the desired protein into a bacterial plasmid, which acts as a vector to transfer the gene into the bacterial cell. The bacteria then use the inserted gene to produce the desired protein.