This is Amazing
In order for a biological cell to give birth to daughter cells, its genome must be replicated. And in order to replicate the DNA molecule, its two strands must first be unwound and separated. Enter the so-called helicase enzymes such as those illustrated in this animation (please click above). And how did all of this evolve? It is, of course, a fact that helicases (and everything else in the world) spontaneously arose from nothing. That may sound strange until you realize that something, namely the universe, came from nothing. So obviously helicases must have come from nothing.
The details of how all that evolving actually happened are another thing altogether. In fact, not only is the evolution of helicases a mystery, but the origin of protein synthesis and the genetic code is another “one of the major mysteries of evolution.” Fortunately, one cutting-edge researcher might be able to take care of both these mysteries with one hypothesis:
I propose that protein synthesis appeared as a side product of helicase activity. The first templates for protein synthesis were functional RNAs (ribozymes) that were unwound by the helicase, and the first synthesized proteins were of random or non-sense sequence. I further suggest that genetic code emerged to avoid this randomness.
This is another example of evolutionary science at work. Only from an evolutionary perspective could a researcher gain such keen insight and realize that the genetic code probably emerged to avoid all that randomness in early cells. That randomness was probably terribly difficult to work with, so of course the genetic code evolved. In hindsight, it was practically inevitable.
So we may not understand everything about the helicase enzymes you watch above. But one thing we know for certain, they evolved. That is a fact.