Which of the following is an example of a hydrophobic conjugated lipid?

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Multiple Choice

Which of the following is an example of a hydrophobic conjugated lipid?

Explanation:
Hydrophobic conjugated lipids are those where a lipid component is covalently bonded to another group in a way that keeps the molecule largely nonpolar. Cholesterol esters fit this because cholesterol is bonded to a fatty acid through an ester linkage. This removes the polar hydroxyl character and adds a long hydrocarbon chain, yielding a highly nonpolar molecule that is water-insoluble and stored in lipid droplets. The other options have polar or charged head groups (phosphates or sugars), which makes them amphipathic rather than purely hydrophobic. Thus cholesterol esters are the best example.

Hydrophobic conjugated lipids are those where a lipid component is covalently bonded to another group in a way that keeps the molecule largely nonpolar. Cholesterol esters fit this because cholesterol is bonded to a fatty acid through an ester linkage. This removes the polar hydroxyl character and adds a long hydrocarbon chain, yielding a highly nonpolar molecule that is water-insoluble and stored in lipid droplets. The other options have polar or charged head groups (phosphates or sugars), which makes them amphipathic rather than purely hydrophobic. Thus cholesterol esters are the best example.

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