00:01
We've been given a strand of dna.
00:02
We want to transcribe it and then translate it.
00:06
So first transcription.
00:09
What do we need to know for this? well, first we know, but we're going from dna to rna.
00:16
So the dna strand has thymine.
00:18
The rna won't.
00:19
The rna will have uracil.
00:21
We also know the base pairing rules.
00:24
Guanine goes to cytosine and vice versa.
00:27
Adonine goes to either thymine or uracil, depending on what nucleic acid we're looking at.
00:32
Finally, polarity.
00:35
So, if i draw two strands of a nucleic acid, and one of them is 5 prime to 3 prime, the other is always going to be the opposite direction, 3 prime to 5 prime.
00:49
This is called anti -parallel pairing, and it always happens in nucleic acids.
00:56
So with that in mind, we're going to go from left to right, so we're going to have to start at 3 prime.
01:05
Because the strands we've been given goes 5 -pram to 3 -prime, so our mrna is going to go in the opposite direction, 3 -prime to 5 -prime.
01:13
So the dna strands starts out g -c -a, the mrna is going to start out c -g -u, and so on.
01:23
So that's all i'm going to do.
01:25
I'm going to look at the strands, and i'm going to write out the corresponding strands.
01:44
It's following the base parallel rules.
01:46
Or i see an a -u -g, is that the first a -u -g? it looks like it is.
01:51
That will be very helpful for the next section.
02:01
A -u -a -g.
02:03
U -a -g.
02:06
So i'm making an effort now to separate them into sets of three.
02:18
A -g, c -a -c -a -c -u -g, a -c -c -u -g, a -c -c -g, u -a -u -u -c, oops, c, a -c -a -a, a, c -u -g -u...
