Proteins serve a variety of important cellular functions, including structural support, movement, enzymatic activity, and interacting with the outside world. Individual protein functions depend on their unique amino acid sequences and complex three-dimensional structures. Protein synthesis is a fundamental biological process where cells build their specific proteins. It involves DNA and RNA and takes place in both the cell nucleus and cytoplasm. DNA is unwound to make an RNA copy that then moves to the cytoplasm for the actual protein synthesis process.