00:01
Okay, so problem one, we're classifying monosaccharides.
00:04
So i have them drawn right here, but as you would notice, i didn't draw the full structures.
00:09
That's because they only really drew the parts that we need to classify the monosaccharides, okay, for the sake of time.
00:17
So in order to classify our sugars, we need to first count how many carbons are there.
00:24
All right, so let's go ahead and count this first one three o's.
00:29
We got one, two, three, four.
00:33
Okay, so since there's four, that would be a tetrose, right? and since you have an aldehyde right here, this would be an aldo tetrose.
00:54
Next, moving on to the second one right below, so we got one, two, three, four, five.
01:02
So that would be a pentose.
01:05
And then we have this ketone right here.
01:10
It's not an aldehyde, so that would be a keto pentose.
01:16
So we're writing keto because it has a ketone.
01:22
And there's five carbons, so that makes it a pentose from the prefix bent.
01:34
Next.
01:36
On the third one, we got tag a toast...