Researchers at the University of Rochester have created a computer that uses 32 strands of DNA to store and process information. It can calculate the square root of the square numbers 1, 4, 9, 16, 25 and so on up to 900.
To begin, the team codes a number in DNA using a combination of ten building blocks. Each combination represents a different number up to 900 and is attached to a fluorescence marker.
The team then controls the hybridization so that it modifies the overall fluorescent signal so that it corresponds to the square root of the original number. The number can then be deduced from the color.
: A DNA computer just calculated square root of 900