Many of the gene products involved in DNA synthesis were initially defined by studying mutant E. coli strains that could not synthesize DNA. The dnaQ gene encodes the ε subunit of DNA polymerase. What effect is expected from a mutation in this gene?

Video transcript

Hello everyone and welcome to today's video. So today we have what specific enzyme is necessary for DNA repair and is encoded by the Dean B gene. And so we're given these D. N. A polymerase is from which we need to identify which one is encoded by this Dean B gene. And then hopefully we have a table that we can refer to that contains each DNA polymerase and the gene that is going to be encoding it. Let's begin by answer choice A. Here we are. Here we have DNA polymerase three which is located here. So DNA polymerase three is going to be encoded by DNA E D N A Q and a whole E. Depending on the sub unit, this is not going to be the DNB gene. So we're going to cancel this out. Then we have see we have D. N. A polymerase five which is located here. As we can see it is going to be encoded by the genes You m you see and um you d this is not the DNB gene. So we're going to cancel this out as well. Then we have D. D. N. A polymerase too which is the first one on our list is encoded by the pole Beijing which is not the gym that we're looking for. So we're going to cancel that as well. Finally we have the Vienna preliminaries for that as we can see is in fact included by the D. In Beijing because of this. We're going to be selecting answer choice B. As a correct answer for a question. I really hope this helped you. and I hope to see you on the next one.