DNA synthesis is the process of making new DNA. DNA is like a big instruction book for our body that tells it how to grow and function. Scientists use machines to create new copies of DNA. It's like making a copy of a book.
First, the scientists take a tiny piece of DNA and break it up into little pieces. Then they put these pieces into a machine that can read the DNA letters (A, T, C, and G), and use those letters to create a new DNA strand.
Imagine you have a box of toy letters, and you want to make a new word. You take out the letters you need and put them together to make a new word. This is like what the machine does, but with DNA letters.
The new DNA strand can then be used in experiments to help scientists learn more about how our bodies work. This is important because it can help us develop new treatments and prevent diseases.