Biophysical chemistry examines the physical principles underlying biological processes and systems. It combines concepts from chemistry, physics, and biology to study the structure, dynamics, and interactions of biomolecules like proteins, nucleic acids, and lipids. Techniques such as spectroscopy, microscopy, and crystallography are often used to investigate these molecular properties, providing insights into mechanisms of action and aiding in drug design and development. This field helps bridge the gap between molecular biology and physical chemistry, enhancing our understanding of complex biological phenomena.