BISC207 Lecture Notes - Lecture 4: Valine, Lysine, Hydrophile

• School: University of Delaware
• Department: Biological Sciences
• Course: BISC207
• Professor: Sikes Robert

Document Summary

Carbohydrates function for quick fuel and short-term energy storage in organisms. Play a structural role in woody plants, bacteria and insects. On cell surfaces, involved in cell-to-cell recognition. Ratio of hydrogen to oxygen is ~ 2-1. Contain presence of h-c-o-h functional atomic groups. Monosaccharides are sugars with 3-7 carbon atoms. Disaccharides- contain two monosaccharides joined by the dehydration (condensation) reactions. Examples maltose, sucrose (glc + fructose), lactose (glc + galactose) Such as starch, glycogen, and cellulose, are long polymers that contain many. In between meals, the liver releases glucose stored in glycogen (maintains 0. 1% May contain up to 4000 glucose units. The storage form of glucose in animals. Some polysaccharides function as structural components of cells. Cellulose is found in the cell walls of plants. Accounts for the strong nature of the cell walls. Has different chemical linkage than starch or glycogen (alternating up and down type of linkage between oxygens) Prevents us from digesting foods with cellulose.