Question

What are the four classes of lipids and what is an example of each?

a) Phospholipids (cell membranes), Steroids (cholesterol), Triglycerides (fats), Waxes (beeswax)
b) Phospholipids (cell membranes), Steroids (testosterone), Triglycerides (oils), Waxes (candles)
c) Phospholipids (cell membranes), Steroids (insulin), Triglycerides (saturated fats), Waxes (paraffin)
d) Phospholipids (cell membranes), Steroids (vitamins), Triglycerides (unsaturated fats), Waxes (sebum)

Answer 1

The four classes of lipids are phospholipids, steroids, triglycerides, and waxes. An example of each is cell membranes, cholesterol, fats, and beeswax respectively.

Step-by-step explanation:

The four major classes of lipids are:

1. Phospholipids - These make up the cell membranes and have a glycerol or sphingosine backbone, two fatty acid chains, and a phosphate-containing group. Example: cell membranes
2. Steroids - These have a basic structure of four fused carbon rings. Example: cholesterol, a component of the plasma membrane and precursor of hormones like testosterone
3. Triglycerides - These are a stored form of energy and consist of fatty acids and glycerol. Example: fats
4. Waxes - These are nonpolar compounds that have various functions such as water resistance and protection. Example: beeswax