Video narration
How can one tiny cell carry the instructions for an entire body? Think of DNA as a recipe book. Its letters in sequence store information-not about dinner, but about how living cells work. A gene is one section of that book: an individual recipe for a specific cellular job. Here is the crucial turn: DNA is not a mysterious substance. It is readable instructions. A cell copies the needed page, reads the gene, and uses those directions to build a protein. Proteins are the working parts and tools of cells. They help form structures, move materials, send signals, and support the processes that make your body function. So how can one tiny cell hold a body's building instructions? Because DNA is a coded recipe book: cells copy its pages and read them to build proteins for the body.