Estradiol is a type of estrogen which is normally secreted by the ovaries. It can be prescribed for many uses, including the relief of menopausal symptoms or for the prevention of osteoporosis and hormone replacement in women who are deficient in estrogen.
Each class of molecule has features that determine its use in living systems. The first class of molecules are called carbohydrates. The simplest type of these, monosaccharide simple sugars, have a basic formula: for every carbon atom, there are two hydrogens and one oxygen, or one water for each carbon. Carbo - hydrate.
This allows carbon atoms to form a tremendous variety of very large and complex molecules. Figure 3.13 Carbon bonding: these structures form the backbone of many different types of organic molecules. Figure 3.12 This model represents a molecule of glucose, an organic compound composed of carbon, hydrogen, and oxygen. The chemical formula for glucose is C 6 H 12 O 6. This means that each molecule of glucose contains six carbon atoms, twelve hydrogen atoms, and six oxygen atoms.