Lab Report 3 Fall20 (1).docx - Name General Biology Laboratory Exercise Lab Report 3 Building Organic Molecules Define the following terms in your own

Lab Report 3 Fall20 (1).docx - Name General Biology...

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Name: General Biology Laboratory Exercise Lab Report 3 Building Organic Molecules. Define the following terms in your own words. 1. Monomer: 2. Polymer: 3. Dehydration synthesis: _ 4. Hydrolysis: 5. Peptide bond: 6. Hydrophilic: 7. Hydrophobic: 8. Monosaccharide: 9. Polysaccharide: _ 10. Protein structure a. Primary structure: _ b. Secondary structure: c. Tertiary structure: _ d. Quaternary structure: 11. Triglyceride: 12. Phospholipid: Pre-lab 3 - 1
General Biology Laboratory Exercise Part A-Virtual Lab Watch Video on Macromolecule lab: Carbohydrates, proteins, fats, vitamins, and other nutrients provide your body with energy and provide the raw materials necessary to carry on life activities. These compounds are present in the plants and animals you use as food. In this lab, you will test for specific compounds and then determine if these are in a fast food value meal in sufficient quantities. Reagents used (Chemical indicators): Biuret solution: tests for protein Iodine solution: tests for starch (complex carbohydrates) Procedure for identification of Proteins (peptide bonds ) : The amino acids of proteins are each made up of an amino group and a carboxylic group. The bond between these two groups found on adjacent amino acids is called a peptide bond a type of covalent bond. This type of bond can be identified by Biuret’s test. Biuret’s solution, which is specific for polypeptides and not free amino acids, will turn from blue color to violet color upon reacting with polypeptides. Procedure for identification of starch : Iodine solution, which is yellow brow in color, reacts with starch to produce a dark Brown or purple color. This distinguishes starch from monosaccharides, disaccharides and other polysaccharides, which do not react with iodine the same way. Part I: Testing of Known Substances: You will learn how to test for each of these organic molecules. Watch the video and write the results observed in the video in the data table below. Table 3.1 Test Reagent used Negative Control tube (color) Solutions tested Positive results solution? Explanation for positive result Carbohydrate s Proteins Pre-lab 3 - 2
General Biology Laboratory Exercise 1. What is a chemical indicator?

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