AQA GCSE Combined Science Trilogy · 8464
Specification 4.3.1.1 · Paper 1
Revise: Infectious diseasesBacteria are small cells that can reproduce by binary fission: one bacterial cell divides into two. Repeated division can rapidly increase the number of bacteria inside a host when conditions are suitable. Some bacteria produce toxins, which are poisons that damage cells and tissues and make the host feel ill.