Biophysics is an interdisciplinary field that combines principles of physics and biology to understand how biological systems work. It explores the physical mechanisms behind processes such as protein folding, cellular function, and DNA replication. By applying techniques from physics, biophysicists can study the structure and dynamics of biological molecules. Researchers in biophysics use tools like X-ray crystallography and NMR spectroscopy to analyze the behavior of biomolecules. This knowledge helps in areas like drug design and genetic engineering, providing insights that can lead to advancements in medicine and biotechnology.