Subject: if photosynthesis and cellular respiration represent an euilibrium

i know so far that these two are reverisble but i wonder how i can explain it 
to a bunch of group by usisin thermodynamic. i have studied this in my bio 
class but then i m not clear. and it will also be nice if u tell be if these 
processes represent equilibrium. and if possible u can paste the url from 
where u get all your info. thanks

Re: if photosynthesis and cellular respiration represent an euilibrium