The two gels illustrated contain dideoxynucleotide DNA-s...

Question

The two gels illustrated contain dideoxynucleotide DNA-sequencing information for a wild-type segment and mutant segment of DNA corresponding to the N-terminal end of a protein. The start codon and the next five codons are sequenced.

Write out the mRNA sequences encoded by each template strand, and underline the start codons.

Accepted Answer

Hello, everyone and welcome to today's video. So which of the following is the M R N A sequence encoded by the templates trend three prime T AC G C T A T G C T A five prime. And so we're given from answer choice a through answer choice D A series of DNA or M R N A sequences that are coded by this template strand. So in order to solve this problem, let's begin by taking this template strand and placing it in the text so we can visualize it and use it better. So we're going to be pasting it into the screen. So remember that the M R N A is going to be from five prime to three prime. So it's going to run opposite. However, the compliment is still going to be the same. So we have T which in the M R N A is going to appear as a, then A which we would think that it would appear as T. But remember that thymine is replaced by U in R N A. So we're going to make that change, then C is going to go for G G for C C for G T for A, A for U T, for a G for C C for G T for A and A again for U. So we have created the complementary sequence of R N A for that template string. And if we look at our answer choices, the correct answer for this question is going to be B which is five prime A U G CJ C G A U AC NGA U three prime. I really hope this helped and I hope to see you on the next video.

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