Question

9 Which molecule can mix with water and is also a source of energy and a storage

Answer 1

Lipid can mix with water and is also a source of energy and a storage  area for energy in the body

Explanation:

Lipid is most commonly called fats, which is mainly composed with hydrogen and oxygen. It has limited amount of nitrogen, oxygen, sulfur and phosphorus. It is source of nutrients. It serves as many ways and purposes. It plays vital role in structure and also function of organism.

It gives energy as well as thermal insulation. Some lipids work as chemical messenger between cells, tissue and organs. These lipids are steroid hormone.