Question

What are the important discoveries of DNA?

Answer 1

DNA's operation is determined by its shape. Each rung of the ladder is made up of a pair of two of the four letters of the DNA alphabet – A, T, C and G. But A will only pair with T, and C only with G. So if you were to split the ladder in two, breaking the paired rungs, then on each of these struts you would have all the information needed to replace the missing one. Hence, from one DNA molecule, you can make two identical molecules. This is happening right now inside you as the cells that make up your body divide, at a rate of around 3,000 letters a minute (bacteria can do it 10 times faster). And the same process has been happening continuously in every cell that has ever existed on Earth. DNA in living cells, as far as we know, is universal, and combined with Darwin's theory of evolution we have a robust model of how life is, and how it came to be, its origins almost 4bn years ago.