General Knowledge quiz II

Is it Sanskrit?
 
Which countries share the northernmost (land) border between sovereign countries?
 
Norway and Russia?
 
Nope. Love's second answer is close but I'm looking for two countries.
 
Because photons are emitted by H2O molecules in the 440-490nm range when it is excited by sunlight due to the relaxation of electrons from the excited state to the ground state (Basic explanation).
 
Sorry, I suppose you don;t get many chemists on this forum then?

What is the only amino acid that is used by the human body that is not chiral?
 
Glycine???
 
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