NURSING EXAM QUESTIONS
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are commonly called fats and oils
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They are “hydrophobic” and do not interact with water
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They are good for energy storage
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They are polar like water
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Detailed explanation-1: -Lipids are non-polar molecules while water is polar molecule, so there is no way for water to attach to a lipid molecule.
Detailed explanation-2: -Most lipids are non-polar (having no charged areas) or only slightly polar, with a very few charged areas. Water mixes with hydrophilic (water-loving) compounds by sticking to their charged groups. Since lipids lack charged groups, the water molecules have nothing to stick to and don’t mix with them.
Detailed explanation-3: -Final answer: Lipids are insoluble in water because lipid molecules are hydrophobic.
Detailed explanation-4: -Lipids, i.e., fatty molecules, on the other hand, are non-polar, meaning that the charge distribution is evenly distributed, and the molecules do not have positive and negatively charged ends..