Fatty acids are present in all lipids. Choice (d) is the claim that is untrue: "All lipids contain fatty acids."
Fatty, waxy, or oily molecules are referred to as lipids. They are soluble in organic solvents but insoluble in polar solvents like water. Lipids consist of: Oils and fats (triglycerides)
Lipids are a type of chemical molecules that are found in both plants and animals and are naturally soluble in non-polar solvents. In other words, lipids don't dissolve in water; instead, they do so in solvents like oil, gasoline, ether, and carbon tetrachloride.
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