Biomolecules are essential components of living organisms, including carbohydrates, proteins, nucleic acids, and hormones, which play critical roles in biological processes. Carbohydrates are classified into monosaccharides, disaccharides, and polysaccharides, while proteins are polymers made from amino acids linked by peptide bonds. Nucleic acids like DNA and RNA serve as the genetic material responsible for heredity and protein synthesis. Vitamins, required in small amounts, and hormones, functioning as intercellular messengers, are also significant components in maintaining physiological balance.