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Name _____________________________________________________Date_______________Per_______ Dehydration Synthesis and Hydrolysis Practice A. Match the correct prefix or suffix or definition to its meaning/word below. DEHYDRATE HYDRO-­‐ SYNTHESIS -­‐LYSIS MONOMER POLYMER 1. To split or break apart; release _LYSIS 2. To make something _SYNTHESIS_ 3. Many monomers hooked together make a _POLYMER_ 4. Means to lose or remove water; to take water away __DEHYDRATE 5. Means water (as in gaining water) HYDRO 6. Building block or single unit of a polymer is a _MONONER B. Examine each example. Indicate if each of the following is an example of dehydration synthesis or hydrolysis. Reaction #1:__DEHYDRATION SYNTHESIS Reaction #2:__HYDROLYSIS_ Reaction #3:__DEHYDRATION SYNTHESIS Protein, carbohydrate, or lipid synthesis Reaction #4:__HYDROLYSIS Digestion of proteins, carbohydrate, or lipid C. Explain in your own words: How can you tell if a chemical equation represents: 1. Dehydration synthesis? _WHEN WATER MOLECULE IS REMOVED FROM EACH SUBUNITS TO FORM A BIGGER MOLECULE. 2. Hydrolysis? _WHEN WATER MOLECULE IS ADDED TO POLYMER AND BROKEN THE POLYMER TO MONOMERS D. Analyze the following diagrams to answer the questions that follow. Below is an example of dehydration synthesis. In dehydration synthesis, a hydrogen atom from one molecule joins with a hydroxyl group (-­‐OH) from another molecule to form water, leaving two molecules bonded to the same oxygen atom. For example, when glucose and fructose combine by dehydration synthesis, they form sucrose and water. Below is an example of hydrolysis. Complex organic molecules broken down by the addition of the components of water – H+ and OH-­‐. are 1. What are the reactants of the dehydration synthesis reaction? GLUCOSE & FRUCTOSE 2. What are the products of the hydrolysis reaction? __GLUCOSE & FRUCTOSE_ 3. How are these two reactions related? __THE SAME REACTION IN DIFFERENT DIRECTIONS_ Summary Review: 1. The JOINING of two monomers causes a water molecule to be lost. This joining to make a polymer is called DEHYDRATION SYNTHESIS_. 2. The SPLITTING apart of two organic molecules in a polymer and adding back the water parts to make individual monomers again is called _HYDROLYSIS. 3. The organic molecules that serve as a source of energy for us are commonly called carbohydrate_. In what organ of your body would the splitting apart (hydrolysis) of these be occurring at a high rate right now? __mouth, small intestine 4. How many water molecules are lost when you join together 114 amino acids together? 113 5. During dehydration synthesis if 42 water molecules were made how many monosaccharides were joined together to make the complex carbohydrate? __43