Discussion
Ultraviolet radiations are lethal due to inactivation of
Answer: A
Ultraviolet radiation is lethal because it damages and inactivates proteins, nucleic acids (by forming thymine dimers in DNA) and pigments. Minerals, water and air, carbohydrates, fats and vitamins and the gases \(\mathrm{O_{2}}\) and \(\mathrm{CO_{2}}\) are not the targets of lethal damage. The answer is the first option.
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