Reading time: ~2 min read
The DNA molecule is a coiled helix, consisting of two spirals, rather like a staircase. The coils in the DNS spiral have an exceedingly regular structure. The vertebrae consisting of sugar and phosphate in both DNA chains revolve at an equal distance around a common axis and twist in the same direction, from right to left. Moreover, there is no haphazard sequencing in the steps between the two arms. The bases that make up the rungs form an angle of 90 degrees to the spiral axis, giving the DNA strip its highly regular, staircase-like appearance.
The steps are joined to one another with a special locking system. The four different components of the rungs –adenine, guanine, cytosine and thymine– are of different sizes. The adenine and guanine bases are large, and cytosine and thymine are small molecules. The dimensions of the molecules that will be opposite one another have been determined in such a way as to ensure equal spaces at every point on the spiral staircase. In order for the steps to be always regular, guanine always pairs with cytosine, and adenine with thymine. Thus small bases always being opposite large ones in the DNA molecule means the distance is stable at every point. The result is a regular staircase extending with no interruptions. However, if the base adenine were to be paired with guanine just once, instead of with thymine, it would be impossible for the helix structure to proceed in a regular manner. Any error in the sequence might thus entirely impair the molecule's chemical structure and prevent the data being used, copied and transmitted. This again indicates that the sequence cannot be the work of chance.
The distance between the turns of neighboring base pairs is also stable. This system ensures equidistance between the staircase coils, some 10 base pairs –in other words, 10 steps– form a complete revolution of 360 degrees.30 DNA coils a billion times a second, and the staircase steps twist by performing their spiral movement.31 This action plays a very important role in DNA's performing two vital functions--directing the formation of protein and self-replication. Prof. Werner Gitt, director of the German Federal Institute of Physics and Technology, says this about this special structure:
The coding system used for living beings is optimal from an engineering standpoint. This fact strengthens the argument that it was a case of purposeful design [Creation] rather than fortuitous chance .32