NUTRITION
LIPIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which statement explains why starches and lipids are insoluble in water?
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Starches are formed by dehydration and lipids by hydration.
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Starches have amino functional groups and lipids have carboxyl groups.
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Starches have a 2:1 ratio and lipids have a 4:1 ratio of hydrogen to oxygen.
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Starches have long polymer molecules and lipids have nonpolar molecules.
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Explanation:
Detailed explanation-1: -Final answer: Lipids are insoluble in water because lipid molecules are hydrophobic.
Detailed explanation-2: -Lipids are hydrophobic molecules-they hate water and don’t dissolve in it, because they don’t have much oxygen in them, and carbon doesn’t much enjoy the water. Carbohydrates have much more oxygen and so are hydrophillic-that is, they do dissolve in water.
Detailed explanation-3: -Lipids are non-polar molecules, due to the presence of long chain hydrocarbons. Organic solvents are non-polar solvents whereas water is a polar solvent. We know that, “like dissolves like". So, non-polar molecules are dissolved in non-polar solvents and vice-versa.
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