Chapter 4 bacteriophage. Bacteriophages ( phages ) are obligate intracellular parasites that multiply inside bacteria by making use of some or all of the host biosynthetic machinery . They are viruses that infect bacteria. Composition of Bacteriophage .
Lytic or virulent phages are phages which can only multiply in bacteria and kill the cell by lysis at the end of the life cycle.
Bacteriophage binding to and injecting their DNA into a bacterial cell
Animation summarizing the lysogenic life cycle of a temperate bacteriophage.