In this video, we"ll talk about three different ways that the cell. In method one, we"ll talk about base excision repair. In this case, there"s a type of damage called deamination. 2017 [00:00:19. 30] this is when a c base within an amino group is deaminated. 2018 base which has a carbonyl group in place of the nitrogen. 2020 [00:00:38. 77] now, you"ll remember that uracil acts the same, base pairs the same as a t. and so. 2021 this seems to the dna like a c to t mutation. 2022 dna glycosylase-- that recognizes that uracil is not to be incorporated into to dna. [00:01:07. 32] and so it"ll scan the genome for places where a 2024 u is present. 2025 will excise the base, then cut the backbones of the sugar and phosphate groups, insert the correct. 2026 base, which is done by dna polymerase. And then dna ligase will seal the nick.