Gizmo Identifying Nutrients

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Gizmos■■■■■■■■■■■■■■■■■■■■■■■■■Marne:Dale:Student Explorationidentifying NutrientsDirections: Follow the instructions t o g o through thesimuiation.Respond t o the questions andprompts i n the orange boxes.Vocabulary carbohydrate, d (saccharide,pid. monosaccharide, polysaccharide, protein, starchPrior Knowledge Questions (Do these BEFORE using the Gizmo.)1.VWiat are the major types of nutrients you can get from food?proteins. lipids, and carboiydrates2.How are these nutrients used by your cody?these nutrients are used in your body for energyGizmo Warm-upHave you ewer wondeted idial s in your food? Sclent sts Lse a variety oftests to determine the nutritional content of food. You wilearn four ofthose tests with the foenrAtej Mdri&rts Gizmo.1.Below tbeFood samples lacel, drag tube Atte the Food sampleholder. Below the Benedict test, click the Test button. 'Aha: i s doneh the Benedict lest?TubeAmaze the Bene: c: test tum orange.2.The Beneoic l sduton i s a lest for monosaccharides; simpe sugarsIk e glucose or fructose (fruit sugar); and some disaccharides sucha s lactose and maltose. In contact with these Suga's, the Benedictsolution turns from blue to greet to orange. Fo'simpicrty, w e willconsider 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 sweetenedonly with table sugar will show a negative Benedict test.Pip-Ml.dirl-:< td.calcnal u »m y . P u b K i - H - rw"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.IdentifyingnutrientsIntroduction: lAost food s composec o f throe types of molecules: carbohydrates . proteinsand lipids•Carbohydrates such a s starches and sugars are major source of energy. Simpe sugars are fourd nsweets 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 emeats, 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 ?yesRecal 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 turnsdark purple i m h e presence of staron.Under Lugol test, dick Test Coes sample A contain starch?no3.Test The Biuret test uses a solution of cotass urn hydroxide {KOH) and copper sulfate (CuSQJ to test forprotein. The Biuret solution turns purpe when proteins are presentUnde- Biuret test click TestCoes sample A contain proteins?no4.Test The Sudan Red test uses a fat-solLde dye, Sudan Red, to indicate the presence of lip ds. When licidsare present, the dye will b e absorbed into the lipids, and w l l appear a s concentrated spots of cokx in thetest 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?no5.Summarize: W a t nutrients does sample A contain?Sampte A only contars monosaccharide5.Analyze: What kind of food is sample A most likely to be? {High light the food type)**A p p e juiceBaked beansOatmealScrambled eggsPijracucatn r mjzvjcrauaa cny. P . B tatiwirqpnhbitKL Z 2020I s mJimrg'"AJ n j h n laHTHd

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