Biotechnology: Principles and Processes — BIOLOGY STD 12 Science — Question

Bacteriophages are viruses that infect bacterial cells by injecting their DNA into these cells. The injected DNA is selectively replicated and expressed in the host bacterial cell resulting in a number of phages which burst out of the cell and reinfect neighbouring cells. Their ability to transfer DNA from the phage genome to specific bacterial hosts during the process of bacterial infection give it to the property be used as vectors.
Examples are: Phage lambda and M13 phages.