temperate; lysogenic+lytic

A; attachment site on tf used to r&a specific receptor site on HBCW

P; ts contracts, drive hollow tube thru BCW >

phage DNA injected into bact cytoplasm >

phage DNA circularises inside bact, prevents degradation from host exonucleases

R; phage DNA incorporated into specific sites of host bact chromosome; inserted phage DNA called prophage >

repressor protein prophage gene expressed; represses GE of other prophage genes controlling phage replication >

phage replication blocked, phage dormant >

bact divides, phage DNA replicates as host bact DNA, passed to each daughter cell >

enables viruses to propagate w/o killing host they depend on

I; env factors induces phage to enter lytic cycle,find new host for replication >

repressor proteins no longer made, phage DNA excised from bact chromosome, switches lysogenic->lytic & lyses host

Review: H2 Biology 15 - Virus reproduction