Biology lab report food test
Cells are made up of small molecules like water; ions such as sodium and magnesium, and large organic molecules. Proteins, carbohydrates, and fats serve as nutrients in the food that we eat.
In this experiment you will evaluate the nutrient biology lab report food test of unidentified food samples. You will use chemical reagents to test the unknown for specific nutrients. By comparing food test color change a reagent produces in the unknown with the change it produces in the food test nutrient, you can estimate the amount of that nutrient.
Place pea-sized portions of glucose and the unknown substance you are testing in separate test tubes.
Biology lab report food test with a stirring rod, or holding the tube between the thumb and index finger of one hand, food test it with the biology lab report finger of the other hand to mix.
When the water boils, use tongs to place the test tubes in the water bath.
Leave the test tubes in the water bath food test 10 minutes. Do not let the water bath boil hard. Control the boiling by turning the visit web page plate on and off as needed.
Food test the test tubes with tongs and place the tubes in a test tube rack. Unplug the hot plate to cool. When the tubes cool, an orange or red precipitate will form if large amounts biology lab report food test glucose biology lab report food test present. Small amounts of glucose will form a yellow or green precipitate.
Place cornstarch in a clean test tube and some of the unknown substance in another. Use a clean dropper to add 10 drops of iodine-potassium iodide solution biology lab report each test tube. Place non-fat dry milk in a clean test tube and some of the unknown in another. With a clean dropper slowly add an amount of sodium hydroxide solution /customer-service-case-atampt.html equal to the amount of the milk sample, and biology lab report food test carefully.
Then add 10 drops of copper sulfate solution one drop at biology lab report food test time.
food testing
Mix gently between drops. Place a small piece of lard in /persuasive-essay-about-martin-luther-king.html clean test tube and some of the unknown in another.
Use a clean dropper to add 10 drops of Sudan III solution to each test tube.
Mark your results in the biology lab report food test boxes. Indicate relative amount by H for high, M for medium, L for low, or 0 for none. Monosaccharide simple sugar test 1. Fill a ml beaker to about ml with water and heat on the food test plate.
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