The article explained how these gases are precursors to DNA:
Acetylene and hydrogen cyanide link up together in the presence of water to form some of the chemical units of life's most essential compounds, DNA and protein. These chemical units are several of the 20 amino acids that make up protein and one of the four chemical bases that make up DNA.
Yeah, and iron ore is a precursor to a car. And a car is a lot less complex than DNA.
Let's not get our panties in a wad.
What concentrations? And are they racemic mixtures?
Cheers!