The most toxic dna lesions induced by lonizing radiation exposure are
a. 4,6 photoproducts.
b. ap sites
c. 5-hydroxymethyluradil.
d. 8-hydroxyguanine.
e. strand breaks.

The correct answer is e. strand breaks

Explanation:

The exposure of ionizing radiation like gamma radiation can cause strand breaks in DNA which is the most lethal damage to eukaryotic cell which are not easy to be repaired and can cause cell death.

It is very difficult to repair the strand break for a cell and is mainly repaired by non-homologous end joining(NHEJ). Although this repair can be sometime error prone and can cause genomic instability and mutation. So it is the most toxic lesion induced by ionizing radiation.

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