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Name:________________________________________ Date:____________ Period: _______ Building Lipid and Protein Molecules Purpose: To model dehydration synthesis reactions resulting in the formation of either protein or lipid molecules. Materials: 14 black carbon atoms 13 red oxygen atoms 4 blue nitrogen atoms 32 white hydrogen atoms 58 green covalent bonds Procedure: As you work through this procedure fill in the data sheet and answer the questions. 1. Each student in the group should make one of the three different fatty acids and glycerol shown below. a. How are the fatty acids similar to each other? ___________________________________________ __________________________________________________________________________________ b. How are the fatty acids different from each other? _______________________________________ __________________________________________________________________________________ 2. Make a fat molecule by removing an H from the carboxyl group end of each acid and three OH from the glycerol. 3. Atttach the OH and H ends to form water molecules. a. Represent this reaction using the chemical formulas and names. b. What type of reaction is this? _________________________________ Why? _________________ __________________________________________________________________________________ 4. Each student in the group should construct one of the four amino acids shown below. a. How are the amino acids similar to each other? _________________________________________ __________________________________________________________________________________ b. How are the amino acids different to each other? ________________________________________ __________________________________________________________________________________ c. How are amino acids similar to fatty acids? _____________________________________________ __________________________________________________________________________________ d. How are amino acids different from fatty acids? _________________________________________ __________________________________________________________________________________ 5. Remove the OH group from one amino acid and an H from another amino acid. Join the OH and H. Join the amino acids. a. Name the two molecules that were formed. ____________________________________________ b. How is the formation of a protein similar to the formation of a fat? __________________________ __________________________________________________________________________________ Data: Molecule Chemical / Molecular Formula (C_H_O_N_) 3 Dimensional Structure (use colored pencils) Glycerol Butyric Acid Caproic Acid Lauric Acid Triglyceride Do not draw!! Molecule Water ____________ ____________ ____________ ___________ Chemical / Molecular Formula (C_H_O_N_) 3 Dimensional Structure (use colored pencils)
