0:00
All right.
00:01
So for this problem, we will be talking about an operon, which is an important term to be familiar with, especially when we're talking about genetic -related things, specifically different physiology and mechanisms.
00:14
And there's a few examples we might have heard of without intuitively understanding their composition.
00:20
So we could be familiar with the lack operon, which is involved in lactose, when it's converted to allelactase, which is then detected by repressor, which then combine to an operon, and then therefore stop a promoter from allowing, i don't even need to get into it that much detail.
00:37
Just trying to refresh your memory a little bit for a previous example that we might have come across.
00:44
We also, specifically in this unit, we should be familiar with an operon.
00:49
It's essentially an operator for looking at the lytic and lysogenic cycles and how it is determined which one will proceed after the bacteriophage infects the host.
01:02
So that's just a little bit of a background in an operon.
01:05
I don't want to explicitly explain it because that will give away the fun of going through the answers together and then verifying what makes the most sense is an answer option.
01:17
So let's just talk about these and try and, first of all, figure out if it is inherently true or false, because we usually want to look for the best to answer for these sort of problems.
01:28
So question a or answer a is a molecule, a molecule that can turn genes on or off.
01:42
That can turn genes on or off.
01:50
So what is this really saying? so when we're talking about something that can turn genes on or off, we are thinking about allowing them to be expressed or not.
01:59
And genes, when they're being expressed, we want to think of them as being proteins.
02:02
A protein is the translated rna code that will allow a physical express.
02:09
To occur.
02:10
So when we're talking about an operon, we know that it's a functioning unit of dna.
02:14
In a molecule, we can consider being dnas that are together, right? i suppose.
02:22
Although that might be a little far -fetched.
02:24
So maybe it's not the best term that chemically we think about molecules as being more of a group of different elements.
02:31
So that doesn't work as well for me.
02:34
But it's not inherently incorrect.
02:38
And when we're talking about turning genes on or off, sure, that is correct because the genes in the operon are either expressed or they're not depending on different things that might bind to them.
02:50
So it's partly true...