Here's a breakdown of the process:
1. DNA: Genes are segments of DNA that contain the instructions for building a specific protein.
2. Transcription: The DNA sequence of a gene is copied into a messenger RNA (mRNA) molecule. This happens in the nucleus of a cell.
3. Translation: The mRNA molecule travels out of the nucleus to the ribosomes in the cytoplasm. Ribosomes are the protein-making machinery of the cell. Here, the mRNA sequence is translated into a chain of amino acids, following the genetic code.
4. Folding: The amino acid chain folds into a specific three-dimensional shape. This shape is essential for the protein's function.
So, the "directions" for making a protein are essentially the sequence of bases (A, T, C, G) within a gene. This sequence determines the order of amino acids in the protein, which in turn determines its structure and function.
