Know that polysaccharides, including cellulose and chitin, and phospholipids, contribute to the structural components of cells and organisms.
Carbohydrates - Polysaccharides
Cellulose is a long (100's) polymer of Glucose molecules. However the orientation of the sugars is a little different to starch or glycogen. In Cellulose, every other sugar molecule is "upside-down". This small difference in structure makes a big difference in the way we use this molecule. |
Know that polysaccharides, including starch and glycogen, and lipids, including fats and oils, contribute to energy reserves in cells.
Energy Reserves in Cells
Go here for a simulation showing how much energy each type of food has. Go to the challenge if you think you know it all.
Here is some more information on Lipids. Too much detail for us, but it has some good diagrams, especially of phospholipids which are important in the cell membrane.