| Act #7: Carbohydrates
Carbohydrates are sugars or starches. They can be simple or complex depending on how many rings are attached to each other. Glucose is an example of a simple sugar and Sucrose is an example of a complex sugar. When a word ends with ~ose it is usually a carbohydrate. a) Take down these notes: 1 ring = monosaccharide, 2 rings = disaccharide, and many rings = polysaccharide. b) Please draw glucose, fructose, and sucrose on your sheet of paper. Do you notice that sucrose is just a combination of glucose and fructose? c) What�s an example of a polysaccharide? Act #8: Testing for simple sugars You can test (see if its there) for simple sugars by using Benedict�s Solution. a) Crumple a salt cracker into a test tube containing 5 ml of water. b) Add 5 drops of Benedict�s Solution to the test tube. c) What do you see? Observations: d) Heat using strong flame for 1-2 minutes. Please use safe lab procedures. e) What do you see? Observations: f) A change in color in your test tube with Benedict�s solution indicates the presence of a simple sugar. Explain why you only see a change in color AFTER you heated the solution. g) What do we need carbohydrates for? h) List 5 food items that have carbohydrates in them. i) What is glycogen? j) What is starch? Act #9: Amino Acids and Proteins There are about 20 naturally occurring amino acids in nature. Amino acids combine to create proteins! a) Draw me a �generalized structural formula for amino acids� pg. 47 text figure 2.16. b) How are amino acids different? c) How do amino acids connect to form proteins? (pg. 47 figure 2.16) |