1) Bacteriophages can undergo either a lytic or lysogenic life cycle. In the lytic cycle, the phage hijacks the host cell's machinery to replicate itself and then causes the cell to burst, releasing new phage particles. In the lysogenic cycle, the phage genome integrates into the host chromosome and replicates with it without killing the cell. 2) The lytic cycle involves adsorption of the phage to the host cell, penetration of the viral DNA, replication of viral genes and proteins, assembly of new viral particles, and lysis of the cell. 3) In the lysogenic cycle, temperate phages like lambda can integrate their genome into the host