It is also argued that although an amino acid could be made randomly, a protein (a long, shaped string of amino acids) is such a precise sequence and structure that it would be impossible to make by chance. Also, a protein or DNA would not be alive by itself; so a whole life form would have to be made all at once. This argument can be seen as a way of saying that natural selection could not have created life. It is argued whether that is a valid point.