The most harmful effect of ionising radiations precisely involves:
Correct answer: B. DNA
- A. Cell membranes
- B. DNA
- C. Mitochondria and ribosomes
- D. Nucleus
Explanation
Ionising radiation is most damaging when it breaks or chemically alters DNA, causing mutations, chromosome damage or cell death. The nucleus is the location of DNA, but DNA itself is the precise primary target named in the options.
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