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Biology > GIZMOS > Identifying Nutrients( The best you can have for understanding purposes) (All)

Identifying Nutrients( The best you can have for understanding purposes)

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Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. What are the major types of nutrients (macromolecules) you can get from food? (see vocabulary above for help) [ Proteins, Carbs, Lipid ... s. ] 2. How are these nutrients used by your body? [ Proteins help rebuild muscles, while carbs provide the body with energy. Lipids store fat for energy.] Gizmo Warm-up Have you ever wondered what is in your food? Scientists use a variety of tests to determine the nutritional content of food. You will learn four of those tests with the Identifying Nutrients Gizmo™. 1. Below the Food samples label, drag tube A into the Food sample holder. Below the Benedict test, click the Test button. Explain what is done during the Benedict test. [ A drop of the solution is added to the test tube and put in heated water.] 2. The Benedict test is a test for monosaccharides; simple sugars like glucose or fructose (fruit sugar). In contact with monosaccharides, the Benedict solution turns from blue to pink. Does Sample A contain monosaccharides? [ Yes, because it went from blue to pink.] Note: Disaccharides such as sucrose (table sugar) and lactose (milk sugar) are more complex than monosaccharides. The Benedict test does not detect disaccharides directly [Show More]

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