Organic chemistry is a major branch of chemistry concerned with the structure, properties, composition, reactions, and preparation of organic compounds. These compounds are generally those that contain carbon atoms, usually bonded to hydrogen atoms, and often incorporating other elements such as oxygen, nitrogen, and sulfur. The field is critical for understanding the chemistry of life, as most biological molecules, including proteins, carbohydrates, lipids, and nucleic acids, are organic in nature. Modern research areas within organic chemistry include the development of novel catalysts, the synthesis of advanced materials, and the study of reaction mechanisms, relying heavily on principles of bonding and molecular geometry to predict and control chemical transformations.