Conversation so far:
What are the different types of macromolecules?
Proteins.Carbohydrates.Lipids.Nucleic Acids.
Tell me about the characteristics of carbohydrates.
Its basic structure is composed of the elements carbon, hydrogen and oxygen, with generally twice the hydrogen as carbon and oxygen. In its simplest form, a carbohydrate is a chain of sugar molecules called monosaccharides.
What are carbohydrates composed of?
Carbohydrates (also called saccharides) are molecular compounds made from just three elements: carbon, hydrogen and oxygen.
What are carbohydrates basic structure?
The general empirical structure for carbohydrates is (CH2O)n. Monosaccharides, which are simple sugars that serve as fuel molecules as well as fundamental constituents of living organisms, are the simplest carbohydrates, and are required as energy sources.
What are the main types of carbohydrates with examples of each?
glucose (monosaccharide)fructose (monosaccharide)galactose (monosaccharide)sucrose (disaccharide)lactose (disaccharide)cellulose (polysaccharide)chitin (polysaccharide)
Tell me about lipids.
Lipids are molecules that contain hydrocarbons and make up the building blocks of the structure and function of living cells. Examples of lipids include fats, oils, waxes, certain vitamins (such as A, D, E and K), hormones and most of the cell membrane that is not made up of protein.

Question: What is their function?
Self-contained rewrite: What are the functions of lipids.