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Gizmo Identifying Nutrients

Interactive biology worksheet using Gizmo to explore food nutrients. Students learn how to identify proteins, lipids, and carbohydrates through lab tests like Benedict’s test, and analyze their role in providing energy.

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    Gizmos ■■■■■■■■■■■■■■■■■■■■■■■■■ Marne: Dale: Student Explorationidentifying Nutrients Directions: Follow the instructions t o g o through the simuiation. Respond t o the questions and prompts i n the orange boxes. Vocabulary carbohydrate, d (saccharide, pid. monosaccharide, polysaccharide, protein, starch Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. VWiat are the major types of nutrients you can get from food? proteins. lipids, and carboiydrates 2. How are these nutrients used by your cody? these nutrients are used in your body for energy Gizmo Warm-up Have you ewer wondeted idial s in your food? Sclent sts Lse a variety of tests to determine the nutritional content of food. You wi learn four of those tests with the foenrAtej Mdri&rts Gizmo. 1. Below tbeFood samples lacel, drag tube A tte the Food sample holder. Below the Bened ict test, click the Test button. 'Aha: i s done h the Benedict lest? Tube A maze the Bene: c: test tum orange. 2. The Beneoic l sduton i s a lest for monosaccharides; simpe sugars Ik e glucose or fructose (fruit sugar); and some disaccharides such a s lactose and maltose. In contact with these Suga's, the Benedict solution turns from blue to greet to orange. Fo'simpicrty, w e will consider tne Benedict test a test for monosaccharides only. Coes Sample A contain these sugars? Note: Sucrase (table sugar) s a disaccharide that isntrf detected by the Benedict test. Foods sweetened only with table sugar will show a negative Benedict test. Pip-Ml.dir l-:< td.calcnal u » m y . P u b K i - H - r w "ra“ttK. Z I D C £zpoi(L«a-n«ig** M l HQta i t M r . B C

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    Activity A : GeMhe Gizmo rescy: ■ C ck Reset. - Drag Sample A i i t o l h e Food sample holder. Identifying nutrients Introduction: lAost food s composec o f throe types of molecules: carbohydrates . proteins and lipids • Carbohydrates such a s starches and sugars are major source of energy. Simpe sugars are fourd n sweets and fruits. Starches are found i n potatoes, cereal, pasta, flour, and ctner plan: products. ■ Proteins are used i n bony structures such a s musdes, skn, and hair. Rich sources of proteins n d u d e meats, da 7 products, and beans • Lip d s {fatsand oils) are used for energy, insulation, and a s an essential building bock of oels. Meats, d a 7 products, and oily plants such a s olives are rich i n lipids. Question: H o w d o you test for carbohydrates, proteins, a n d l i p i d s ? 1. Test: Order the Benedict test, dick Test . I s tie Benedict test positive id' sample A ? yes Recal that orange i s a positive test far monosaccharides (and some d saochandes). 2. Test: The Lugol test uses iod ne to lest for starch, a polysaccharide (complex carbohydrate}. Iodine turns dark purple i m h e presence of staron. Under Lugol test, dick Test Coes sample A contain starch? no 3. Test The Biuret test uses a solution of cotass urn hydroxide {KOH) and copper sulfate (CuSQJ to test for protein. The Biuret solution turns purpe when proteins are present Unde- Biuret test click Test Coes sample A contain proteins? no 4. Test The Sudan Red test uses a fat-solLde dye, Sudan Red, to indicate the presence of lip ds. When licids are present, the dye will b e absorbed into the lipids, and w l l appear a s concentrated spots of cokx in the test tube. (No spots ind cates tnat I p i d s a r e not present} Under Sudan Red test, click Test Does sample A contain lip ds? no 5. Summarize: W a t nutrients does sample A contain? Sampte A only contars monosaccharide 5. Analyze: What kind of food is sample A most likely to be? {High light the food type) ** A p p e juice Baked beans Oatmeal Scrambled eggs Pijracucatn r m jzvjcra uaa cny. P . B t atiwirq pnhbitKL Z 2020 I s mJimrg'" AJ n j h n laHTHd

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