Pre-Lab+Questions

Read 2.4 Carbohydrates 2.5 Lipids 2.6 Proteins Answer the following questions... 1. What is the usual function of various carbohydrates in humans? They store energy 2. What is the difference between a simple carbohydrate and a complex carbohydrate? Glucose and Maltose are examples of simple carbs with one or molecules. Starch, an example of a complex carb has 3 or more molecules 3. What is starch? What is the source of starch? Starch is a polysaccharide like a potato 4. What is "fiber" and of what benefit is it in the diet? Fiber helps to drain the digestive system. Technically cellulose 5. Why does low-carb dieting work sometimes? But what are the risks? The obvious reason it works is because there are fewer carbs, but carbs normally come with fiber which is needed in every fiber. 6. What is the function of fats and oils? Fat is for long-term energy. Examples are butter, lard, corn oil, and so on. 7. What are fats and oils composed of? Lipids 8. What is the difference between a saturated and unsaturated fat? DESCRIBE EXAMPLES Unsaturated fats have double bonds in the carbon chain and saturated fats have none. 9. What are the uses of phospholipids in the body? DESCRIBE EXAMPLES they are constructed like fats and the rest of the body becomes hydrophobic 10. What are the uses of steroids in the body? DESCRIBE EXAMPLES they are lipids that have structure from fat 11. Why do we need fat in our diet? DESCRIBE EXAMPLES we need it for energy like peanut butter 12. What are the major functions of proteins in organisms? DESCRIBE EXAMPLES proteins practically do everything 13. What is the subunit of a protein? How do they get their name? amino acids. The name comes from COOH and NH2 14. How does the shape of a protein relate to its function? DESCRIBE EXAMPLES It becomes irreversible