1. Genes: DNA is organized into genes, which are specific segments of DNA that contain the code for a particular protein.
2. Transcription: When a protein is needed, the gene for that protein is copied into a molecule called messenger RNA (mRNA). This process is called transcription.
3. Translation: The mRNA then travels from the nucleus to the ribosomes, which are like tiny protein factories within the cell. Here, the mRNA sequence is translated into a chain of amino acids, following the genetic code.
4. Amino Acids: There are 20 different amino acids, and the sequence of these amino acids determines the protein's unique structure and function.
5. Protein Folding: Once the chain of amino acids is complete, it folds into a specific three-dimensional shape. This shape is critical for the protein's function.
In summary, the instructions for building proteins are encoded within the DNA sequence of genes. These instructions are transcribed into mRNA, which is then translated into a chain of amino acids. This chain folds into a specific three-dimensional shape, creating the final protein.
