Biomolecular structure refers to the three-dimensional arrangement of biological molecules, such as proteins, nucleic acids, carbohydrates, and lipids. These structures are crucial for the function of biomolecules, as their shape determines how they interact with other molecules in living organisms. For example, the protein structure can be categorized into four levels: primary, secondary, tertiary, and quaternary, each contributing to its overall function. Understanding biomolecular structure is essential in fields like biochemistry and molecular biology. Techniques such as X-ray crystallography and NMR spectroscopy are commonly used to determine these structures, providing insights into how biomolecules work and their roles in processes like metabolism and cell signaling.