Phospho

On the virus problem, I was wondering how it is that the Covid-19
causing virus has the protein required to enter the cell. Still not sure, but
I did stumble on an interesting vulgarization piece on ATP, the energy
currency of the cell. What was interesting is the notion of irreducible complexity.
No simpler form of the process would do the trick. Below:

https://www.trueorigin.org/atp.php

One can see phosphorous, at 15, just below nitrogen:

From the French-language Wikipedia:

Khan avademy:

 From the Russian-language Wikipedia: