Answer:
A) Lipids are mostly nonpolar.
Step-by-step explanation:
Lipids are a class of molecules that are mostly nonpolar, meaning that they are not attracted to water.
Sugars, on the other hand, are polar molecules, meaning that they are attracted to water.
This difference in polarity is why lipids are insoluble in water, while sugars are soluble in water.
So the correct answer is A.
Let's see the other choices and why they are incorrect:
- B) Lipids are mostly saturated. This is not always true. There are both saturated and unsaturated lipids.
- C) A lipid is made up of only hydrocarbons. This is also not always true. Some lipids, such as phospholipids, contain phosphorus.
- D) A lipid dissolves in water. This is not true for most lipids. Only a few types of lipids, such as glycolipids, are soluble in water.