CELL STRUCTURES AND FUNCTION
BIO MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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potato chips
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bread
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sugar
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carrots
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Detailed explanation-1: -The brown paper test for lipids is positive when food is placed on the paper and a spot forms which will allow light to pass through it.
Detailed explanation-2: -Hold up the paper to the light and look at each spot. The foods that contain lipids will leave a greasy mark that turns the brown paper translucent.
Detailed explanation-3: -To test for lipids in a solid piece of food you use a piece of filter paper. 1 Rub some of the food onto a piece of filter paper. 2 Hold the paper up to the light. If the paper has gone translucent, the food contains lipids.
Detailed explanation-4: -The Sudan IV test will test positive for lipids. The test procedure involves adding a few drops of Sudan IV to the test solution. Sudan IV is a dye that will stain lipids. If no lipids are present then the dye will sink to the bottom of the test tube.