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Question
What is the primary mechanism by which UV radiation causes mutations?
Options
Causes thymine dimers
Intercalates into DNA
Causes base pair changes
Breaks DNA strands
MCQ
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Solution
UV radiation is the most common physical mutagen and causes mutations by inducing the formation of thymine dimers, where adjacent thymine bases become covalently linked. This distortion of the DNA structure leads to replication errors and ultimately mutations in the genetic sequence.
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