The lytic and lysogenic life cycles of a temperate bacteriophage

The lytic cycle progresses directly from infection through phage reproduction to lysis. The lysogenic cycle features the integration of the phage into the host chromosome, where it resides until excision and resumption of the lytic cycleThe lytic cycle progresses directly from infection through phage reproduction to lysis. The lysogenic cycle features the integration of the phage into the host chromosome, where it resides until excision and resumption of the lytic cycle

Lytic cycle 1— Infection —> Lysogenic cycle o Phage injects DNA a through hollow tail. Lysogenic cycle i G Progeny phage particles are released by lysis from host bacteria. Phage chromosome circularizes to protect it from degradation. 9 Integration of phage DNA into the host chromosome. a DNA and proteins are assem- bled into progeny phages. | Multiple divisions and Lytic cycle many generations may I occur in this state; . . hage DNA is copied e Replication of phage prop t . chromosome occurs; when cell divides. host DNA breaks down. 6 The lytic cycle resumes. 0 Under the direction of phage genes, transcrip- tion and translation produce new phage components. 0 Excision of prophage from the host chromo- some.