Tutoring biology, you might be asked about food irradiation. The tutor briefly talks about it.

Food irradiation is a preservation method that exposes food to radiation to kill organisms that might cause spoilage.

A question I had was, “Why doesn’t irradiation damage the nutrients in food?” From reading, I’ve surmised that the radiation separates the organisms’ DNA into building blocks, rendering it useless (so that they mostly die or just can’t reproduce). However, those building blocks are still useful as raw materials to whoever consumes the food – that’s as I understand, anyway.

Food irradiation has been an accepted technique for decades; the US space program has used irradiated food since the 1970s.

Source:

uw-food-irradiation.engr.wisc.edu

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.