What about protein molecules? They can be made from as few as 50 or as many as several thousand amino acids bound together in a highly specific order.
Just for the record (not to go too far off-topic) but this is incorrect. Your source ignores the fact of redundancy.
Take just one example, a protein molecule that is involved in respiration called Cytochrome C. There are a billion times more possible arrangements of amino acids that will result in a completely functioning protein than there are atoms in the universe.
When scientists examine the actual amino acid sequences of Cytochrome C in living things they find that the degree of differences across species precisely mirrors the relationship predicted by evolution. When they examine the underlying nucleotide sequences the pattern of common ancestry becomes even more apparent.