Lecture 5 - DNA Replication

Question 1

Why do bacteria have toxin-antitoxin system?

Answer 1

It ensures that only cells with the plasmid after cell division will survive; selfish operon

Question 2

What happens if dont have plasmid with antitoxin/toxin?

Answer 2

then antitoxin CcdB bind to DNA gyrase preventing DNA replication because increase torsion from unrelieved positive supercoils.