Answer the following question given this paragraph: 

Some lipids contain the element phosphorus as well as oxygen, carbon, and hydrogen. These lipids are called phospholipids. Two layers of phospholipid molecules make up most of the cell membrane in the cells of living things.


Q: What are lipids that contain phosphorus called?

 Choices:

- amino acids

- alkaloids

- eukaryotes

- phospholipids

A:
phospholipids
