Nobody has ever made a single (plausible) suggestion of how that might work. Molecules have radiofrequency spectra inside of the high magnetic fields of NMR machines, not out in the open. It would be a major scientific discovery to find a protein or something that could work as a radio antenna, and due to the sizes involved relative to the wavelengths, I am not sure if that would even be possible.

(To answer people talking about heating: Yes, you can microwave food to cook it. But as far as I know you can only cook it - because you're coupling with large-scale modes that have no structure relative to the arrangement of tissues in the food.)