The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all.

-Which of the following statements concerning unsaturated fats is True?
A)They are more common in animals than in plants.
B)They have double bonds in the carbon chains of their fatty acids.
C)They generally solidify at room temperature.
D)They contain more hydrogen than saturated fats having the same number of carbon atoms.
E)They have fewer fatty acid molecules per fat molecule.

Question

The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all.

-Which of the following statements concerning unsaturated fats is True?
A)They are more common in animals than in plants. 
B)They have double bonds in the carbon chains of their fatty acids. 
C)They generally solidify at room temperature. 
D)They contain more hydrogen than saturated fats having the same number of carbon atoms. 
E)They have fewer fatty acid molecules per fat molecule.

Quizplus · Accepted Answer

Unsaturated fats are characterized by having one or more double bonds in the carbon chain of their fatty acids. This causes them to have a kinked or bent shape, which prevents the molecules from packing tightly together and solidifying at room temperature. Saturated fats, on the other hand, have no double bonds and pack tightly together, resulting in a solid state at room temperature. Option A is incorrect because unsaturated fats are actually more common in plants than in animals. Option C is incorrect because unsaturated fats are generally liquid at room temperature. Option D is incorrect because saturated fats have more hydrogen atoms than unsaturated fats. Option E is irrelevant to the characteristics of unsaturated fats.

The Following Questions Are Based on the 15 Molecules Illustrated