front 1 Would Benedict's reaction give a positive with all carbohydrates? Why? | back 1 no, because the reagent only tests for simple sugars |
front 2 Benedict's reagent is a test for what? | back 2 simple carbs/reducing sugars/monosaccharides/disaccharides |
front 3 Does paper contain starch? | back 3 yes |
front 4 What chemical elements are present in starch? | back 4 carbon, hydrogen, and oxygen |
front 5 what is a reducing sugar? | back 5 all monosaccharides and some disaccharides/any sugar capable of acting as a reducing agent |
front 6 what are the component molecules making up of triglycerides? | back 6 fatty acids & glycerol |
front 7 dry cleaners often use carbon tetrachloride. What stains would this remove? | back 7 oil & wax compounds |
front 8 what are the building blocks of protein? | back 8 amino acids |
front 9 how would you determine whether milk contains reducing sugars? | back 9 test with Benedict's reagent |
front 10 what are the positive color change when using Benedict's reagent? | back 10 green to brick-red or brown |
front 11 what could you say about a substance if it did not turn blue-black with iodine? | back 11 there is no starch present |
front 12 Is CO2 (carbon dioxide) considered organic? why? | back 12 no, it does not contain hydrogen |
front 13 Biuret's reagent is made up of. . . | back 13 sodium hydroxide or potassium hydroxide and a dilute solution of copper sulfate |
front 14 what does hydrolysis mean? | back 14 a process in which water is used to split a substance into smaller particles |
front 15 the hydrolysis of sucrose resulted in the presence of what two sugars? | back 15 glucose and fructose |
front 16 are glucose and fructose reducing sugars? | back 16 yes, they are monosaccharides |
front 17 organic compound | back 17 a compound that contains carbon in the form of chains or rings |
front 18 inorganic compound | back 18 a compound that is not of animal or plant origin ; does not contain carbon |
front 19 the elements most often found in living organisms are. . . | back 19 carbon, hydrogen, oxygen, nitrogen, & phosphorous |
front 20 three major groups of organic compounds that compose living organisms with examples. | back 20 proteins/enzymes/helps produce tissue lipids/fats, oils/stores energy carbohydrates/sugar, starch/give the body energy |
front 21 list the 3 types of carbohydrates with examples. | back 21 monosaccharide - glucose dissacharide - sucrose polysaccharide - starch |
front 22 polymer | back 22 large molecule made up of chains or rings of monomers/ |
front 23 how are polymers formed? | back 23 dehydration synthesis |
front 24 monomer | back 24 Simple one-unit molecules that make up complex molecules |
front 25 dehydration synthesis | back 25 the joining of two molecules or compounds following the removal of water |
front 26 hydrolysis | back 26 breaking polymers into monomers by adding water |
front 27 why has water been included as one of the test materials for reducing sugars, starch, and protein? | back 27 to act as a control |
front 28 reducing sugars are usually. . . | back 28 monosaccharides |
front 29 monosaccharides release. . . | back 29 electrons |
front 30 what reagent is used to test for reducing sugars? | back 30 Benedict's reagent |
front 31 what is formed and settled out of a solution | back 31 precipitate |
front 32 what chemical substance is used to detect the presence of starch? | back 32 iodine |
front 33 the largest class of lipids are. . . | back 33 triglycerides |
front 34 lipids are soluble in. . . | back 34 ether, acetone, and chloroform |
front 35 why are lipids so important to living systems? | back 35 1. concentrated source of energy 2. thermal insulation 3. shock absorber for organs, muscles, and bones |
front 36 give an example of emulsion. | back 36 oil and water |
front 37 give an example of an emulsifier | back 37 detergent |
front 38 emulsion | back 38 droplets of one liquid suspended in another/each insoluble in the other |
front 39 emulsifier | back 39 a substance that stabilizes an emulsion |
front 40 name the chemical substance used to indicate the presence of lipids | back 40 sudan IV |
front 41 what reagent is used to test for the presence of protein in food? | back 41 Biuret's reagent |
front 42 If protein is present, the tested substance will turn ____ when mixed with Biuret's reagent. | back 42 violet |
front 43 When reducing sugars is present, the copper ions in the Benedict's Reagent are reduced to | back 43 metallic copper/copper I ions |
front 44 Testing for Organic and Non-Organic | back 44 Heat test tube with small amount of one substance, hold over heated flame. If deposit turns black, the substance left on tube wall is carbon. |
front 45 If substance turns black what are you testing for | back 45 organic and non organic |
front 46 Sugar, Meat and Flour are all | back 46 organic |
front 47 Table salt and baking soda are | back 47 non organic |
front 48 The a substance turns blue black what is it positive for and what test is used. | back 48 Positive for Starch, using the Starch test |
front 49 If a spot turns transparent to translucent | back 49 positive for lipids |
front 50 If a pH level is above 7 the compound is a. . . | back 50 base/alkaline |
front 51 If a compound has a pH level of 7 it is. . . | back 51 neutral |
front 52 If a compound has a pH level below 7 it is. . . | back 52 acidic |
front 53 example of an acid compound is. . . | back 53 lemon juice |
front 54 example of a base compound is. . . | back 54 baking soda |
front 55 example of a neutral compound is. . . | back 55 distilled water |
front 56 what does pH stand for? | back 56 potential of hydrogen |