Describe the differences between mono-, di-, and polysaccharides.

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Hi, everybody. And welcome back. Our next problem says which of the statements below incorrectly describes mono die or polysaccharide. A monosaccharide are the simplest form of carbohydrates and can be hydrolyzed into simpler sugars. B disaccharide are carbohydrates composed of two monosaccharide molecules linked together by a Glyco bond. C monosaccharide have a general formula of and then in parentheses C h2o uh subscript N outside the parentheses where N is typically 3 to 7 and then D polysaccharides can be linear or branched and contain hundreds to thousands of monosaccharide. Well, this one is fortunately a pretty straightforward one, our prefixes tell us most of what we need to know. So mono meaning one, I meaning two poly, meaning many. So let's just look and check our statements and see which one is incorrect. So to say we've got monosaccharide. So that mean one are the simplest form of carbohydrates and can and can excuse me be hydrolyzed into simpler sugars. So this one's definitely incorrect. In fact, you can see it cause me to actually read it wrong the first time because my brain just corrected it automatically. So this one is false, going to circle that because we're looking for the incorrect answer. So mono Syros, because they are the simplest form, they're single sugar molecules. They cannot be hydrolyzed into simpler sugars. They are like the base form. So we already have our incorrect answer. So if I were on a test, pick this, I move on, I don't even look at the others. But this is a practice problem. Let's be a little more thorough. So choice B dy saccharide are carbohydrates composed of two monosaccharide molecules. Yes, we have that prefix dye to go with two linked together by a glyco cytic bond. So yes, that is the correct kind of bond between the two monosaccharide. Disaccharide can be two of the same monosaccharide or two different ones. So examples of these would be sucrose which is a disaccharide composed of one fructose and one glucose unit. So as we can see, then fructose and glucose are examples of monosaccharide. We'll put them up here and maltose which is two glucose molecules bound together by a glyco cytic bond. So just two examples of two different dissect rides. This is a true statement and therefore not our answer choice. C monosaccharide have a general formula of C H2O and all that in parentheses, subscript N where N is typically 327 and this is correct. This is a formula you would look for. So for instance, in glucose is a six carbon molecule. So we have C six H 1206 but again, that can vary as it says with N being between three and seven typically. So this is a true statement, not our answer. And finally choice D polysaccharides. So we've got poly, meaning many can be linear or branched and contained hundreds to thousands of monosaccharide. And this is also true. So these can be truly huge. Um We know that they can be used for storage since you have all of these sugar units strung together that can be broken down when the body needs energy. So, examples of polysaccharides are glycogen and cellulose um like a gym used to store sugar essentially in your liver and cellulose found in plant cell walls. But again, we're looking for the incorrect statement and our incorrect statement is choice. A monosaccharide are the simplest form of carbohydrates and can be hydrolyzed into simple sugars. See you in the next video.

Describe the differences between mono-, di-, and polysaccharides.

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Key Concepts

Monosaccharides

Disaccharides

Polysaccharides