Name a naturally occurring carbohydrate and its source for each type of carbohydrate listed in Problem 20.83.

Question

Accepted Answer

Hello, everyone. Let's look at our next question below is a list of naturally occurring carbohydrates along with their sources and types of carbohydrates, which of the following options is not accurate. So we're looking for the incorrect answer. So let's read through each of these and check all the parts of the answer choices for accuracy. Remembering we're looking for the one that is wrong choice. A the sugar we're talking about is lactose. It says this is a, the type is disaccharide. Well, this is correct. Lactose is composed of one glucose unit and one galactose unit. And its source is milk. So many people know this and some lots of people are lactose intolerant and have trouble drinking cow's milk. So milk is a source of lactose, which is a dy saccharide. So that is correct. So therefore, we're going to cross that out. We'll put a little check mark by each of these since they're all correct choice B our sugar is maltose. And first thing we need to check is uh is that naturally occurring? Yes, it is. And maltose is a di saccharide. That's the type that is correct. Maltose is composed of two glucose units and the source for maltose is barley. That is also correct. You can think of malt um coming from Barley to help you remember that. So we'll cross out trust B as all of those descriptors are accurate. Now, we're on to choice C our sugar is Pectin, say naturally occurring carbohydrate, the type dy saccharide. Well, here is our inaccuracy and it can help us if we look at the source. Here, the source is cell wall of plant. That is true. And we think of cell walls, we probably think about more complex carbohydrates. And that is true for Pectin. Pectin is a complex polysaccharide with many sugar units. It is found in the primary cell walls of plants. It's abundant in the green parts of terrestrial plants, but it is not a disaccharide. So choice C is going to be our answer as being our option. That is not accurate. Finally, just to be thorough, let's look at choice D the sugar here is fructose, naturally occurring type is monosaccharide. Yes, fructose can't be broken down any further. It's a single six carbon sugar molecule and its source is fruit is pretty easy to remember from that name fructose. So to d not our answer since all three descriptors are correct. So in our list of naturally occurring carbohydrates with sources and types of carbohydrates. Our non accurate option is choice C speaking of Pectin, which is indeed found in the cell walls of plants but the inaccurate information, it's listed as a diacide when it's actually a complex polysaccharide. See you in the next video.

Name a naturally occurring carbohydrate and its source for each type of carbohydrate listed in Problem 20.83.

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Key Concepts

Monosaccharides

Disaccharides

Polysaccharides