Which of the following is the best explanation for why unsaturated fats tend to be more fluid at
biological temperatures than saturated fats?
a. Double bonds in saturated fats cause them to be denser and thus more solid than
unsaturated fats.
b. The presence of extra hydrogen atoms in saturated fats makes them lighter, so they float
away from water and congeal together more easily than unsaturated fats.
c. The presence of extra hydrogen atoms in saturated fats makes them denser than
unsaturated fats, and denser materials tend to be more solid.
d. Because unsaturated fats can still be hydrogenated but saturated fats cannot, the
unsaturated fats are more reactive and thus more fluid.
e. Kinks in the chain of an unsaturated fat create more disorder or irregularity in the structure
of the molecule, making unsaturated fats harder to pack together than saturated fats.
E
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