Dna Replication Video

And this is going to be the next codon. So what am I talking about with polymerase. So cytosine just like that. Well, it turns out that that is not the case.

And this is actually a kind of conceptual level of how replication is done before a cell divides and replicates, and the entire cell duplicates itself. This process of replication is discontinuous as the newly created fragments are disjointed. And this process is called replication. And what we wanna do in this video is get a better appreciation for why it is suitable, mp3 song bailando and the mechanism by which it is the molecular basis for heredity.

If you're seeing this message, it means we're having trouble loading external resources on our website. And so it'll construct the sequence of amino acids. And so this is just what we're talking about when we talk about the antiparallel structure. The primer always binds as the starting point for replication.

They're actually much more fascinating than that. Well you have one of four bases and you have them in three different places, so you have four times four times four, possible codon words I guess you could say. So there we go, actually I didn't wanna do that.

Leading and lagging strands in DNA replication

And this for the most part, and this is kind of how the information for life is stored. Actually let me write this down. And then cytosine pairs with guanine. And then finally I have a G.

DNA Replication (Advanced Detail)DNA replication and RNA transcription and translation

And these proteins are essentially the molecules that run life for the most part. At least for that section of, at least for that gene. And it actually turns out, the more that we unwind it on one side, the more tightly wound it gets on this side. So we have an adenine and thymine, adenine and thymine, adenine and thymine. And then I copy and then I paste, and it's just like that.

And just like that I was able to construct a new right hand side using that left hand side. So the first thing that needs to happen, right over here, it's all tightly, tightly wound.

So this might be part of a gene Actually whoops, let me make sure I'm using the right tool. Share facebook twitter email. So let me get my pen tool out now, let me deselect this, get the pen tool out. So, it's a Okazaki fragments, and so what you have happening here on the lagging strand, you can think of it as, why is it called the lagging strand? Proteins are made up of sequences of amino acids.

And we covered this in the introduction video as well, but it's nice to see the different processes next to each other. So let's say you have that right over there, let me copy and paste it. Thymine is still going to pair with adenine, just like that.

DNA replication and RNA transcription and translation

RNA and protein synthesis

Ribonucleic acid, let me write that down. And then we have an A, let me make sure I change it to the right color. Alright, so from this side, from this left side, or at least what we are looking at as the left side, you can then construct another right side based on this information. Or actually used to code for a certain type of protein.

Or we would need to be able to replicate it. And so this one seems pretty straightforward. So using the original right hand side, once again the T is paired with the A, let me do that in adenine's color. And how many possible codons do you have?

By downloading, you agree to the permissions to use this file. So let me write that, it is tightly, tightly wound. These two backbones, these two strands are parallel to each other, but they're oriented in opposite directions. And that process is called translation.

Search hundreds of free science education resources Search. Really just give you the conceptual idea of what happens. Adenine only pairs with thymine and cytosine only binds with guanine. So let's understand what a molecular basis of heredity would need to do. And so let's see what that actually looks like.

Each molecule consists of a strand from the original molecule and a newly formed strand. And they also, you might have more than one codon coding for the same amino acid. As a cell divides, the two new cells would want to have the same genetic material. And so you can imagine if you were to split these, these things you could call them two sides of the ladder, that either side could be used to construct the other side. And replication, you can imagine taking either splitting these two sides of the ladder, and actually let's do that.

DNA Replication Steps and ProcessDNA replication

Guanine is gonna pair with cytosine, and cytosine is going to pair with guanine. Chromatin condenses to form chromosomes during cell division.

Now on this end, as we said it's antiparallel. And so let me copy and then let me paste. So protein is essentially a bunch, a sequence of these amino acids put together.

But you're still going to have cytosine and guanine pairing. And we can do the same thing here using the original right hand side.

DNA Replication (Advanced Detail)

The two sides are therefore replicated with two different processes to accommodate the directional difference. So when it's all done, you're gonna have two double strands, one up here for on the lagging strand, and one down here on the leading strand. So actually I think I'm on the wrong, let me go back here. So this is overkill and allows codons to be used for other purposes as well.

And that enzyme is the topoisomerase. And then let's copy and paste the other side. These primers are then replaced with appropriate bases.