Question

What is the primary mechanism by which excessive ultraviolet (UV) rays damage skin cells?

Options

• UV rays provide beneficial vitamin D synthesis without any harm

• UV rays repair damaged DNA in skin cells

• Non-ionising radiation damages skin cells and increases the risk of skin cancer

• Ionising radiation kills skin cells immediately

Answer 1

Excessive ultraviolet (UV) rays from sunlight are classified as non-ionising radiation that can damage skin cells and increase the risk of skin cancer. Unlike ionising radiation, UV radiation causes damage through different mechanisms but still leads to cellular transformation and cancer development.