Consider a DNA template strand of the following sequence: 5’-A...

Question

Consider a DNA template strand of the following sequence: 5’-A C T G C C A G G A A T-3’.

A) What is the sequence of the corresponding DNA coding strand? Include directionality.

DNA Template Strand: 5’-A C T G C C A G G A A T-3’.

DNA Coding Strand:

B) What is the sequence of the corresponding mRNA strand? Include directionality.

mRNA Strand:

Accepted Answer

Okay, everyone, consider a DNA template strand of the following sequence. What is the sequence of the corresponding DNA coding strand include directionality. Okay, so we have our particular strand of DNA bases here, and we're trying to find what is the sequence of the coding strand. So remember, when we're talking about transcription and translation, there are two strands of DNA the template strand and the coding strand. The template strand is used by our Nepal memories to make an m r a or an RNA transcript that is complimentary to the template strand. And the coding strand is the other strand that is not used by our Nepal Emery's. However, the coding strand gets its name because it should have the same code as the RNA being created because it is also complimentary to the template strand. But it's a little bit different, because remember that RNA has use instead of teas, and DNA has tease instead of you. So remember that DNA has timing, while RNA will have your A cell. Okay, don't forget that. Okay. So what we have to do first is we have our template strand here in yellow, and we just need to find the complementary DNA coding strand. So the first thing that I like to do is I like to put my directionality in order. I like toe identify the ends of the strands of nucleotides on. We know that the template strand in the coding strand should be anti parallel to one another. Meaning they're going in different directions. So I can see that this end of the template strand is five prime. So I'm going to make this end of the coding strand three prime. And this one down here, five prime. So now I know for sure that they are anti parallel. So now I can go through and I can make the complementary bases. So the first base I have here is a So that means we need a T and then g a c g g t c c up running out of room. I have to move this T t a. Put my five prime back on. Okay, so now if you're doing a worksheet or homework or a test, I would always recommend going back and double checking that your complementary bases are correct and that you wrote everything down Well, because that's a super common mistake. So everything looks good to me. So that is going to be our DNA coding strand, complementary to our template strand. So now the next part of the question says, What is the sequence of the corresponding mRNA strand again include directionality. So the Mariana Strand that is being created should be complimentary to the template strand, just like the DNA coding strand. So now for simplicity, you could just do the same thing and make and figure out which bases are complementary, just like we did for the coding strand. Or we could just write the code of the DNA coding strand and replace all the teas with views. Because if you think about it, the DNA coding strand is complementary to the template strand. And so is the Marna. We just have to make sure that there are no thigh means in our Mara and replace those time means with your sales. So again, we're just gonna pretty much rewrite what we've already got. But instead of a t that I see here and here and right here, I'm just gonna replace them with your cells. So we're gonna have you G A C G G u C c u u a five friends. And this makes total sense because the directionality is correct. Technically, the Marina Strand is still anti parallel to the DNA template strand, and it has the same code as the coding strand. Except it has your sales instead of thigh means. Okay, everyone, hopefully that makes sense. Let's move on to our next video.

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