And so we see that the fact that water is the solvent, the properties of water that acts as a solvent in the formation of the DNA molecule actually favorably leads to the formation of that double helix DNA. And finally let's discuss how the thermodynamics of this reaction is also favorable. So let's suppose that this is our system and everything outside this box, everything outside our system are the surroundings. And let's suppose that the temperature at which our reaction takes place is either room temperature or we can also say it's a body temperature. So it's either 25 degrees Celsius or a body temperature 37 degrees Celsius. Now, before the reaction takes place, we have these single strands of DNA.