Key points for Chapter 9 4. How could a dna damage be converted to dNa mutation? 5. What are the mechanisms to repair DNA damage? Describes how base excision and repair and nucleotide excision repair work? 6. What is translesion DNA synthesis? Why it is important?Key points for Chapter 9 4.How could a DNA damage be converted to DNA mutation? 5.What are the mechanisms to repair a DNA damage? Describes how base excision and repair and nucleotide excision repair work? 6.What is translesion DNA synthesis? Why it is important?