The four major categories of biomolecules—proteins, carbohydrates, fats (lipids), and nucleic acids—serve distinct but essential roles in biological systems. Proteins are made of amino acids and function primarily as enzymes, structural components, and signaling molecules. Carbohydrates provide energy and serve as structural elements in cells, while fats are important for energy storage, insulation, and forming cellular membranes. Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
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