identifying_biomolecules_virtual_lab.doc

identifying_biomolecules_virtual_lab.doc - Identifying...

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Identifying Biomolecules Virtual Lab Scientists use a combination of biology and chemistry for their understanding of life and life processes. Carbohydrates make up a large group of chemical compounds found in cells. Carbohydrates are an energy source or are used in making cell structures. Pre-Lab Questions: 1. What three elements are found in all carbohydrates? Carbon, H ydrogen, and Oxygen 2. What is the ratio for all carbohydrate formulas? 1:2:1 3. What are examples of monosaccharides? Simple Su gars 4. What are examples of disaccharides? Simple Sugars 5. What are examples of polysaccharides? Starches 6. What four elements are found in proteins? Carbon, Hydrogen, Oxygen, and Nitrogen 7. What are the monomers for proteins called? Amino Acids 8. Lipids do not have a set structure but do contain two components that help to identify them called? Glycerol and Fatty Acids(Unsaturated and Saturated Fats) You will learn how to test for these organic molecules by completing a virtual lab at Complete each of the tests for carbohydrates, proteins and fats. When you have finished click on the foods button to test for the presence of which organic compounds are found in various common foods. Step 1: Testing for Carbohydrates Monosaccharides are single sugars that react with an indicator called Benedict's solution . The reaction changes the color of the reagent to green, red or orange depending on how much sugar is present. Polysaccharides are complex sugars that react with an indicator such as Iodine . The reaction changes the color of iodine to a dark blue/black color in the
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