For which purpose do biochemists insert human genes into bacteria?

to find a cure for the common cold

to produce insulin for diabetics

to kill resistant strains of bacteria

to evolve certain species of bacteria

Insertion of human genes into bacteria, also known as recombinant DNA technology, is used for the large scale production of human insulin, using bacteria as the insulin-producing machinery. The gene containing information for insulin production is inserted into the DNA of bacteria, which transcribe and translate it, and insulin is produced.