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BI Lab 3

biochemistry the study of the chemistry of living organisms
carbohydrates larger organic compounds made of sugars
lipids larger organic compounds made of fatty acids
proteins larger organic compounds made of amino acids
nucleic acids larger organic compounds made of nucleotides
indicator a chemical (or mixture of chemicals) that causes a characteristic color change when mixed with a specific type of organic molecule
positive control uses an indicator with a sample known to have the substance for which you are testing; you will be certain your test is accurate, that your indicator is working, and that you know what color indicates the presence of the substance
negative control uses an indicator with a sample that will not react with the indicator; most cases, will be water, which contains none of the substances for which u are testing; u will be certain that u know what color indicates the absence of the substance
Lugol's solution (IKI) contains iodine, which will react with starch; the normal amber color will turn blue-black in the presence of starch
Benedict's solution used to test for the presence of glucose
Biuret Reagent used to test for the presence of proteins
acids substances that release hydrogen ions when dissolved in water
base any substance that releases hydroxide ions in water
pH scale measures the hydrogen ion concentration of a solution
0, most acidic, to 14, most basic range of pH scale
Created by: pace_sauce



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