- Bacteria dies & breaks open releasing all its contents to the surroundings.
- The released organelles especially DNA can be picked up by another bacteria via its channel proteins.
- This picked up DNA can be incorperated into the genome of the bacteria that recieved it.
- E.g. insertion of an r-strain and s-strain into mice
> r-strain + heat killes s-strain = mouse died & living s-strain bacteria were present.
Where genetic material can be exchanged.
1 - A conjugation tube forms between a donor & recipient. An enzyme makes a nick in the plasmid.
2 - Plasmid DNA replication starts. The free DNA strand starts moving through the tube into the recipient bacteria.
3 - In the recipient cell, replication starts on the transferred DNA.
4 - The cells move apart & the plasmid in each bacteria forms a circle.
Advantage -> may contribute to genetic variation - in the case of antibiotic resistance genes, survival in the presence of these chemicals could be passed on.