Topics: Protein, Metabolism, DNA Pages: 2 (682 words) Published: April 1, 2013
Biochemistry: categories of organic compounds
Ruddy Severino

There are four major compounds that compose the human body. It is impossible that anything living on earth today can live out these organic compounds. Those compounds are carbohydrates, lipids, proteins, and nucleotides. Each compound has a major important function that is essential to the human body as well as other living organisms on earth.

Carbohydrates serve as the main source of energy. Carbohydrates contain carbon, hydrogen, and oxygen in the ratio of 1:2:1. Carbohydrates play a major role when it comes to the breakdown of food to produce energy. Carbohydrates are classified in size, monosaccharide, disaccharide, and polysaccharide. Polysaccharide provides a quick-release energy source that keeps up energized between meals. Certain amounts of carbohydrates are used for structural purposes as well. Others are attached to outer surfaces of cell membranes to lead cellular interactions.

Lipids function as structural components of cell membranes, source of insulation, and energy storage as well. Lipid molecules are most known for forming basic structures of cell membrane. There are three main types of lipids, triglycerides, phospholipids, and steroids. Triglycerides represent the most concentrated and abundant source of usable energy, when oxidized, large amounts of energy are yielded. They are stored in fat deposits beneath skin and around body organs where they help articulate the body and protect its deeper tissues from the lack of heat and bumps. Triglycerides function as storage from for excess foods. Any type of food consumed excessively needs to be converted to fat and stored. Phospholipids are structural components of cells. Lecithin is a phospholipid that is part of our cell membranes and myelin which provide electrical insulation for nerve impulse transmission. Steroids like cholesterol are another component of cell membranes and a form of cholesterol in the skin that is changed...
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