Exposure to UV Light from the Sun or Tanning Beds

Question

Exposure to UV light from the sun or tanning beds causes
A)depurination.
B)deamination.
C)alkylation.
D)thymine dimers.
E)oxidation.

Accepted Answer

Exposure to UV light primarily causes the formation of thymine dimers, where two adjacent thymine bases on the same DNA strand become covalently linked, leading to errors in DNA replication and repair.