system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 - In DNA there are four molecules that combine in the double helix a bajillion times to create you. Since they come in pairs, how is there so much variety to life? There's only four options - this pair, or that one, flipped this or that way.

Is there a certain amount of these four combinations that then become a "set"?
gpt
Same way a computer program is just 0 and 1, yea, not many options, but if you combine it enough you can get as many combinations as you need, just needs to be long enough. Because of that, it's essentially the length that determines the complexity.

As for a set, yes, DNA has start and stop codons, essentially a protein is defined by the stuff between a start and stop codon. Since the ends are marked, proteins can be as long as they need to be.