Carbohydrates are a vital class of organic macromolecules essential to biological life, generally defined by the empirical formula (CHâ‚‚O)n. Structurally diverse, they include simple sugars (monosaccharides), which serve as the fundamental building blocks, and complex polysaccharides, which provide both energy storage and structural support. Metabolically, carbohydrates are crucial because they are efficiently broken down to release glucose, the primary fuel source utilized by most forms of life. Beyond energy provision, some carbohydrates form structural components, such as those found in plant cell walls or microbial matrices. The biochemical pathways involved in their utilization, including glycolysis and oxidative phosphorylation, are central to sustaining cellular respiration and maintaining energy homeostasis within biological systems.