In this video, we're going to begin our introduction to DNA repair. It's important to note that even small mutations to the DNA within a cell can have tremendous effects on the life of a cell. However, thankfully, there are multiple DNA repair mechanisms within a cell that are conserved across all domains of life. Moving forward in our course, we're going to talk about several different types of DNA repair mechanisms. We're showing you an image right here that represents our map of the lesson on DNA repair as we move forward in our course. You can use this map, to help guide you through our lesson as we discuss DNA repair mechanisms. Notice here we have at the top DNA repair mechanisms, and we've grouped these DNA repair mechanisms into four groups: those that repair nucleotide mismatches, those that repair damaged DNA, those that repair what are known as Thymine Dimers, and those for repairing many mutations, extensive damage. Moving forward, we're going to be following the leftmost branches first, and then we'll zoom out and continue to follow the path as you see here. First, we're going to talk about DNA repair mechanisms that repair nucleotide mismatches. This includes DNA Polymerase proofreading, and it also includes mismatch repair. After we cover those, we'll move on to talk about repairing damaged DNA, and this is going to be specifically referring to base excision repair. Then we'll talk about repairing Thymine Dimers, and this is going to include nucleotide excision repair. We'll then discuss photo reactivation. After that, we'll talk about repairing many mutations, repairing extensive damage and this is going to be followed by SOS repair. This is a map of our lesson moving forward and we'll get to talk about all of these different DNA repair mechanisms in their own individual separate videos, starting with the DNA polymerase proofreading. So, I'll see you all in our next video to talk more about that.
16. Microbial Genetics
Introduction to DNA Repair
16. Microbial Genetics
Introduction to DNA Repair - Online Tutor, Practice Problems & Exam Prep
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concept
Introduction to DNA Repair
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Video transcript
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Problem
ProblemBased on the map above, if the cell needed to repair a nucleotide mismatch mutation, which form of repair could it use?
A
Nucleotide excision repair.
B
DNA Polymerase proofreading.
C
Mismatch repair.
D
Photoreactivation.
E
A and D.
F
B and C.
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Problem
ProblemBased on the map above, if one of the bases in a strand of DNA is damaged and needs to be replaced, what mechanism will the cell use to repair the DNA?
A
Mismatch repair.
B
Nucleotide excision repair.
C
Base excision repair.
D
Photoreactivation.
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