[jackhack]

If you mean the jet airplane is the simpler of the two, I would agree. The famous Roche Biochemical Pathways chart of just those mecahnisms that are understood illustrates this perfectly: http://www.expasy.ch/cgi-bin/show_thumbnails.pl

[JoeAltmaier]

Right. Proteins alone, there are something link 10^9 in one cell. Plus all the 'parts' the proteins deal with (many more)