DNA and RNA are two types of nucleic acids.The LIPID MAPS Lipid Classification System is comprised of eight lipid categories, each with its own sublassification hierarchy. Nucleic Acids: biological polymers composed of nucleotides and important for gene inheritance.Proteins: composed of amino acids, proteins provide structural support for tissues, act as chemical messengers, move muscles, and much more.They not only provide energy but are also important for energy storage. Carbohydrates: biomolecules that include sugars and sugar derivatives.In addition to lipids, other organic molecules include: Biological polymers are vital to the existence of all living organisms.Vitamin K aids in the blood clotting process and maintaining strong bones. Vitamin E acts as an antioxidant and also aids in immune function. Vitamin D aids in the absorption of other nutrients including calcium and iron. Vitamin A is important for vision as well as skin, teeth, and bone health. Fat-soluble vitamins include vitamins A, D, E, and K. They are eliminated from the body more slowly than water-soluble vitamins. Plants often have wax coatings that help them to conserve water.įat-soluble vitamins are stored in adipose tissue and in the liver. Waxes are composed of alcohol and a fatty acid.Steroids most often have a four-fused ring structure. Human sex hormones, like testosterone and estrogen, are classed as steroids.Phospholipids have four major components: fatty acids, a glycerol component, and both a phosphate group and a polar molecule.The structure of the fatty acids determines whether or not the fat is considered saturated or unsaturated. Fats have glycerol in addition to three fatty acids.Waxes, steroids, phospholipids, and fats are the most common types of lipid groups.Examples of such solvents include acetone and ether. Lipids, as a class of compounds, are insoluble in water but are soluble in other organic solvents.

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