NH+Pre-Lab+Questions

Read 2.4 Carbohydrates 2.5 Lipids 2.6 Proteins Answer the following questions... 10. What are the uses of steroids in the body? DESCRIBE EXAMPLES 11. Why do we need fat in our diet? DESCRIBE EXAMPLES 12. What are the major functions of proteins in organisms? DESCRIBE EXAMPLES 13. What is the subunit of a protein? How do they get their name? 14. How does the shape of a protein relate to its function? DESCRIBE EXAMPLES**
 * 1. What is the usual function of various carbohydrates in humans?** quick and short term energy storage
 * 2. What is the difference between a simple carbohydrate and a complex carbohydrate? DESCRIBE EXAMPLES** Simple Carbohydrates are called monosaccharides. They have one or two molecules. Glucose or Maltose are examples of simple carbohydrates. Complex carbohydrates, polysaccharides, have 3 or more molecules. Some examples are starch, glycogen and cellulose.
 * 3. What is starch? What is the source of starch?** Starch is a polysaccharide form of glucose that is stored for energy in plants such as potatoes, and bread.
 * 4. What is "fiber" and of what benefit is it in the diet?** Fiber is cellulose. It is found in plant cell walls. It helps to clean out the digestive system.
 * 5. Why does low-carb dieting work sometimes? But what are the risks?** It works because you aren't eating as many carbohydrates and therefore aren't storing as much. It can be unhealthy because carbs come along with fiber usually. Without the fiber, the digestive system doesn't get cleaned out. Also, the soluble fiber helps to prevent cholesterol absorption and prevent heart disease.
 * 6. What is the function of fats and oils? DESCRIBE EXAMPLES** Fats and oils such as lard, butter, corn oil, and soybean oil, are used for long term energy storage.
 * 7. What are fats and oils composed of?** lipids- One glycerol molecule and three fatty acid molecules
 * 8. What is the difference between a saturated and unsaturated fat? DESCRIBE EXAMPLES** Saturated fats have no double bonds between the carbon atoms. Unsaturated fats have double bonds in the carbon chain where there are less than two hydrogens to one carbon.
 * 9. What are the uses of phospholipids in the body? DESCRIBE EXAMPLES