Multiple Choice
Why does a gram of fatty acids provide about twice as many calories as a gram of glucose?
32. Lipids
Fatty Acids
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Which of the following is true regarding saturated fatty acids?
A
They are typically liquid at room temperature.
B
They have one or more double bonds between carbon atoms.
C
They contain only single bonds between carbon atoms.
D
They are less stable than unsaturated fatty acids.
Verified step by step guidance1
Understand the structure of saturated fatty acids: Saturated fatty acids are composed of long hydrocarbon chains where all the carbon atoms are connected by single bonds. This means there are no double bonds present in the chain.
Compare saturated and unsaturated fatty acids: Unsaturated fatty acids contain one or more double bonds between carbon atoms, which introduces kinks in the chain and affects their physical properties.
Consider the physical state at room temperature: Saturated fatty acids, due to their straight chains, can pack closely together, making them typically solid at room temperature, unlike unsaturated fatty acids which are usually liquid.
Evaluate stability: Saturated fatty acids are generally more stable than unsaturated fatty acids because the absence of double bonds makes them less reactive to oxidation and other chemical reactions.
Identify the correct statement: Based on the structural characteristics and properties discussed, the statement 'They contain only single bonds between carbon atoms' is true for saturated fatty acids.
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