Question

question 29 (1.3 points) what does our skin have to protect skin cells against uv radiation and subsequent dna damage? keratin carotene cholecalciferol melanin

Explanation:

Melanin is a pigment in skin that absorbs UV - radiation, protecting skin cells from DNA damage. Keratin is a structural protein, carotene is a pigment with antioxidant properties but not main for UV protection, and cholecalciferol is a form of vitamin D related to sunlight exposure but not for direct UV - protection of cells.

Answer:

melanin