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Ch. 13 - The Genetic Code and Transcription
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All textbooksKlug 12th EditionCh. 13 - The Genetic Code and TranscriptionProblem 24

Chapter 13, Problem 24

Describe the role of two forms of RNA editing that lead to changes in the size and sequence of pre-mRNAs. Briefly describe several examples of each form of editing, including their impact on respective protein products.

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Hi everyone. Let's take a look at this practice problem. Together determine the type of RNA editing. Where an RNA sequence is one nucleotides shorter than the corresponding D. N. A sequence. So you have D. N. A. Becoming RNA and the RNA has to undergo editing. Now the names of the types of RNA editing are a lot like the DNA mutation names. And here we have a type of editing where one nucleotide is taken out. So R. N. A. Sequence is shorter than the D. N. A. Sequence. Let's look at the options. We have a substitution editing. So in this type of editing, one nucleotide is substituted for another. So let's say you have a guanine is replaced with the aside a zine and in this instance there's no change in the length of the R. N. A. Therefore is incorrect. Be insertion editing. This is where a single nucleotide is added and this would increase the length of the RNA compared to the D. N. A. Therefore B is also incorrect for c deletion editing. This is where you take out a single nucleotide and therefore the RNA sequence is shorter than the D. N. A. Sequence. And this is our answer because we are one nucleotide shorter. Alright everyone, I hope you found this helpful and I'll see you soon for the next practice problem
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