Assume that a mutation affects the gene for each of the ...

Question

Assume that a mutation affects the gene for each of the following eukaryotic RNA polymerases. Match each mutation with the possible effects from the list provided. More than one effect is possible for each mutation.

RNA Polymerase Mutation Effect(s)
RNA pol I _______________
RNA pol II _______________
RNA pol III _______________
snRNA _______________

Some pre-mRNA is not synthesized.

Accepted Answer

Welcome back, everyone. Let's look at our next problem. Mutations in the gene encoding RN A polymerase. One can have a direct effect on choice. A transcription of ribosome, rnarrn A B transcription of messenger RN am RN A C transcription of transfer Rnatrn A or D, both A and B. So we need to recall what it is that RN A preliminaries, one does and that is the transcription of RRN A. So that's going to lead us to choice A, but I'm not going to definitively pick it just yet since I do have that option of both A and B. So let's think about what transcribes messenger RN A and the MRN A is transcribed by RN A polymerase two, not plume R one. So choice B will be incorrect and that also eliminates choice D. And then finally, when we look at choice C, which is transcription of TRN A, that would be RN A polymerase three. So that's why that's not correct. So we'll cross that off. So then we can definitely pick our answer as choice. A mutations in the gene for RN A plum race, one would have a direct effect on transcription of ribosome RN A, you'd expect down the line because you need those large RN A molecules to make up ribosomes. You would then probably end up having nonfunctional ribosomes as a result if you had a gene mutation in RN A plum race one. But again, choice A is our answer here. See you in the next video.

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