What molecules are organic?
Organic molecules are the chemicals of life, compounds composed of more than one type of element, that are found in, and produced by, living organisms. The feature that distinguishes an organic from inorganic molecule is that organic contain carbon-hydrogen bonds, whereas inorganic molecules do not. The four major classes of organic molecules include carbohydrates, proteins, lipids and nucleic acids.
Organic molecules are essential. Almost everything you can touch or see is an organic molecule. Your body is composed primarily of water and organic molecules. Food is organic, and medicines are almost exclusively organic molecules. Most surfaces are organic, including wood and plastics. Without organic molecules, you wouldn't exist!
Organic molecules are most abundantly found inside living organisms, but they are dispersed throughout the world's biosphere; in addition, there are interstellar gas clouds which contain organic molecules, and the atmosphere of some of the moons in the outer solar system is known to contain organic molecules, and there are likely to be many other places in the universe where we haven't looked yet, that also contain organic molecules.