Aim: How can we describe the structure of carbohydrates ?

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Presentation transcript:

Aim: How can we describe the structure of carbohydrates ? Do Now Complete Worksheet HW due tomorrow Quiz on Friday

Monosaccharides Simple sugars with 3 to 7 carbon atoms Glucose, fructose, galactose

Monosaccharide Milk Sugar Fruit Sugar Use image to discuss the structure of the two simple sugars and their molecular formula C6H12O6. Use the InterWrite tablet to circle the functional group.

Carbohydrates FIGURE 2–11 The Formation and Breakdown of Complex Sugars.

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Carbohydrates FIGURE 2–11 The Formation and Breakdown of Complex Sugars. Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings

Carbohydrates FIGURE 2–11 The Formation and Breakdown of Complex Sugars.

Building sugars Dehydration synthesis glycosidic linkage | glucose monosaccharides disaccharide maltose maltose - Bond between 2 monosaccharide's

Building sugars Dehydration Synthesis monosaccharides | fructose glucose sucrose (table sugar) disaccharide sucrose = table sugar

Disaccharides Two simple sugars condensed by dehydration synthesis sucrose = glucose & fructose maltose = glucose & glucose lactose = glucose & galactose (lactose intolerance)

Disaccharide Differentiate between the simple sugars and the complex sugar. Again, emphasize the structure and molecular formula C12H22O11. Use the InterWrite tablets to circle the functional group. Maltose is two glucose molecules; forms in digestive tract of humans during starch digestion.

Polysaccharides Many monosaccharides condensed by dehydration synthesis Cellulose (a structural component of plants) Starch (main energy reserve in plants) Glycogen (energy reserve in animals)

Starch is straight chain of glucose molecules with few side branches. Polysaccharide Identify the structure of the polysaccharide. Highlight for students how the long chains of monomers form this polymer. Also, use the InterWrite tablets to circle the functional group. Starch is straight chain of glucose molecules with few side branches. Types of Carbs

Starch vs. Cellulose

Share and Pair Summary Activity

Summary Distinguish inorganic and organic compounds. Why are carbohydrates important? Explain why glucose is a simple monosaccharide. Why does synthesis and hydrolysis pertain to carbohydrates?