Can quantum entanglement affect the chemistry of molecules?
I've not really read anything on it, but a short while ago research on the role of entanglement in excitonic transfer in the photosynthetic light harvesting apparatus caused quite a stir.

Here is an ArXiV preprint of a paper on entanglement in an antenna protein from C. tepidum. It was published in Nature Physics. The authors note the extraordinary result of entanglement being observed in an inherently quite 'noisy' system.