Multiple Choice
How do fatty acids found in fats and other lipids differ from one another?
32. Lipids
Fatty Acids
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What is the primary structural difference between a saturated and an unsaturated fatty acid?
A
Saturated fatty acids have a longer carbon chain than unsaturated fatty acids.
B
Saturated fatty acids are liquid at room temperature, while unsaturated fatty acids are solid.
C
Saturated fatty acids contain more oxygen atoms than unsaturated fatty acids.
D
Saturated fatty acids have no double bonds between carbon atoms, while unsaturated fatty acids have one or more double bonds.
Verified step by step guidance1
Identify the key structural feature of saturated fatty acids: they have no double bonds between carbon atoms in their hydrocarbon chain.
Recognize the key structural feature of unsaturated fatty acids: they contain one or more double bonds between carbon atoms in their hydrocarbon chain.
Understand that the presence of double bonds in unsaturated fatty acids introduces kinks in the hydrocarbon chain, affecting their physical properties.
Note that the absence of double bonds in saturated fatty acids allows them to pack closely together, typically making them solid at room temperature.
Conclude that the primary structural difference is the presence or absence of double bonds in the carbon chain, which influences the physical state and properties of the fatty acids.
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