Final answer:
The biological methods for steam, ozone, and peracetic sterilization contain chemicals that work as strong oxidizing agents to damage and sterilize cells.
Step-by-step explanation:
The biological used for team, ozone, and peracetic sterilization contains chemicals. These processes employ strong oxidizing agents like peracetic acid and ozone gas, which are capable of producing free radicals to damage the macromolecules in cells, thereby leading to sterilization. While these are chemical methods, others exist such as those using heat or radiation. For instance, steam sterilization or autoclaving uses moist heat to penetrate and kill microorganisms, while ionizing radiation can sterilize heat-sensitive materials by damaging microbial DNA.