Chemistry : The Chemistry Of Life

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Macromolecules- The Chemistry of Life
The purpose of this lab was to test for macromolecules consisting of starch (carbohydrates), lipids, proteins, and nucleic acids. Testing for the macromolecules occurred by using specific reagents on each macromolecule. If a color change occurred, then the sample would prove to be positive for that macromolecule. For simple sugars, the Benedicts solutions was used as the reagent; for starches, the iodine solution was used as the reagent; for lipids the Sudan III solution was used as the reagent; and for the proteins, the Biurets solution was used as the reagent.
Macromolecules make up the structures of cells; therefore they are known to be in all forms of life. Macromolecules are made up of carbohydrates, lipids, proteins, and nucleic acids. These macromolecules are also monomers and when linked together they form polymers. The different reagents are used to find the presence of the macromolecules.
Carbohydrates are molecules which are composed of carbon, hydrogen, and oxygen atoms. Carbohydrates are broken down into three classifications; the first being monossaccharides. Monossaccharides are also known as “simple sugars” because they are composed of a single molecule such as glucose, fructose, or galactose. Two monossaccharides make a disaccharide, which is the second classification. The most common disaccharide is sucrose, also known as table salt. The third classification is polysaccharides, which is
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