Final answer:
Free radicals can be used by the body for beneficial functions such as killing pathogens.
Step-by-step explanation:
The statement is true. Although free radicals are often associated with damaging effects on the body, they can also serve beneficial functions. For example, the immune system uses free radicals to kill pathogens such as disease-causing microorganisms. Free radicals are highly reactive molecules that contain unpaired electrons, allowing them to easily oxidize other molecules and neutralize pathogens in the body.