What is the main purpose of chemical reactions in biological systems?

The main purpose of chemical reactions in biological systems is to produce new substances with different properties. This transformation is crucial for various biological processes, such as metabolism, growth, and development. For instance, during cellular respiration, glucose is converted into energy, carbon dioxide, and water through a series of chemical reactions. These reactions result in new compounds that are essential for the cell's energy requirements and the production of byproducts used by other systems.

By producing new substances, these chemical reactions facilitate important functions within living organisms, such as building cellular structures, synthesizing enzymes, and generating necessary biomolecules. The ability to create new compounds with unique properties allows organisms to adapt and respond to their environment effectively.