00:01
Right, so for this question, we'll be talking about plasmids, which is an interesting term and concept that we need to just briefly understand before moving to the question, which goes a bit more into specifics about plasmids, a different context where we can think about them in or as and just different functions associated.
00:20
So let's talk a little bit about a plasmid.
00:22
So first of all, we're talking about dna.
00:25
So plasmids are self -replicating dna.
00:29
By self -replicating, we were just thinking about positive replication or making more dna from a strand.
00:37
Now, what's unique about plasmids is that we can think about them as, first of all, they're sort of a ring shape, typically when they're depicted.
00:47
So it's interesting for the visualization components.
00:50
And they are extra chromosomal, meaning they exist outside of the chromosome, which is very fascinating.
01:04
So it's a dna, it's genetic material that is existing outside of the chromosomes.
01:12
And it can still replicate, so it's still active.
01:14
It's not complete junk dna or anything that.
01:19
I guess that's a bit different.
01:20
Those are just genetic material that doesn't code for anything.
01:24
But either way, it still can go about its business without existing in the chromosome, which is typically where we think about dna to exist.
01:32
And this can be in many different contexts.
01:36
So outside of the chromosomes, i'm just going to draw a little x there for the chromosomes that we could potentially picture.
01:42
So now let's talk a little bit about the answer options and see what makes sense, because we're looking for which are true about plasmids, which of the answer options is true.
01:51
So a circular protein molecules.
01:55
It sounds great.
01:56
See, there are circular molecules, but, uh -oh, we ran into the problem with a protein.
02:02
So this is a very obvious, incorrect answer, because.
02:06
They're tripping you up by choosing the wrong macro molecule.
02:09
We're not talking about proteins.
02:10
We're talking about nucleic acids, specifically dna.
02:13
So this cannot be correct because of that inclusion.
02:18
Now, b required by bacteria.
02:22
And let's just write out the rest of them from here.
02:24
That last one was very easy, so it's easy to get out of the way.
02:27
But let's just kind of pack things in here, and then we can work through the different answer options, discuss our understanding of plasmids and the associated answers.
02:39
Now we have a tiny bacteria, okay, for c, tiny bacteria.
02:49
Interruption d, there's d and e left, so let's just put these on the board, then we can talk about things a bit more.
02:56
May confer to, make it for resistance, sorry, i'm getting ahead of myself, may confer resist to antibiotics, and by antibiotics, we're just thinking about usually medication that is used to target and kill bacteria, biotics, right? and then answer option e, let's wrap it up with good old red to distinct, the interruptions distinct, a form of a transposable element.
03:38
So we've got lots of different things to talk about here, lots of fun...