2.  Think about what you had for breakfast, lunch today. What in your breakfast or lunch would be considered carbohydrates? Why are they considered carbohydrates?

3.  Distinguish between monosaccharide, disaccharide and polysaccharide  Classify sugars as polymers or monomers  Explain why starch is a polysaccharide and sucrose is not  Explain the biological significance of starch, cellulose and chitin

4.  Monosaccharide  Disaccharide  Polysaccharide  Polymer  Glycogen  Cellulose  Chitin

5.  Are long chains of small building blocks  4 Types: ◦ Carbohydrates ◦ Proteins ◦ Lipids ◦ Nucleic Acids (DNA and RNA)

6. Distinction between polymer and monomer  Polymers ◦ large molecules made of identical or similar building blocks  Monomers ◦ Small molecules ◦ Building blocks of polymers

7.  Sugars ◦ Provide energy ◦ Make cell components and other structures  Starches ◦ Are polymers ◦ Made up of sugars, the building blocks of starch ◦ Enzymes link the sugars together to form starch ◦ Stores energy in plants & animals

8.  Monosaccharide ◦ single sugar ◦ Ex. Glucose, Fructose  Disaccharides ◦ two monosaccharides linked together ◦ Ex. Maltose, Sucrose Glucose Maltose = 2 Glucose molecules linked

9. Types of Sugars (cont.)  Polysaccharide ◦ Polymer with hundreds to thousands of monosaccharides linked together ◦ Ex. Starch

10. Monosaccharide Disaccharide Polysaccharide Thumbs up-monomer/ Thumbs down- polymer ? 10

11. Biological Significance of Carbohydrates  Storage of Energy ◦ Starch in plants  Breaks down into sugars when needed when needed ◦ Glycogen in Vertebrates  in liver and muscle cells  Breaks down into sugars when needed when needed

12.  Structural ◦ Cellulose  makes up the cell wall of plant cells  Biological Significance  – Only herbivores can break down this polymer due to an enzyme this polymer due to an enzyme in their intestinal bacteria in their intestinal bacteria ◦ Chitin  part of exoskeleton of arthropods (lobster, shrimp)  Biological Significance  Few organisms have the enzyme that breaks down this polymer

13. Three Minute Paper You have 3 minutes to write down 3 key points of today’s lesson. Be ready to share.